# `Tucan.Themes`
[🔗](https://github.com/pnezis/tucan/blob/v0.7.0/lib/tucan/themes.ex#L1)

Helper functions for `Tucan` theme.

You can apply any of the supported themes through the `Tucan.set_theme/2` helper:

```tucan
Tucan.scatter(:iris, "petal_width", "petal_length")
|> Tucan.color_by("species")
|> Tucan.shape_by("species")
|> Tucan.set_theme(:latimes)
```

> #### Themes and `livebook` {: .warning}
>
> If you are using `Tucan` with `livebook` notice that
> [`kino_vega_lite`](https://github.com/livebook-dev/kino_vega_lite) applies by default
> a theme that may override `Tucan` theme settings. You can disable the default
> theme through `Kino.VegaLite.configure/1`:
>
> ```elixir
> # disable default livebook theme
> Kino.VegaLite.configure(theme: nil)
>
> Tucan.scatter(:iris, "petal_width", "petal_length")
> |> Tucan.color_by("species")
> |> Tucan.shape_by("species")
> |> Tucan.set_theme(:dark)
> ```

## About themes

A `Tucan` theme is nothing more than a keyword list with a `VegaLite` configuration
object with some styles applied and some metadata. Every theme must have the
following format:

    [
       theme: [],          # the actual theme configuration
       name: :name,        # an atom with a unique name
       doc: "description", # a description of the theme,
       source: "url"       # a url to the source of the theme if any for attribution
    ]

## Default themes

`Tucan` comes pre-packed with a set of themes, borrowed by the [Vega Themes](https://github.com/vega/vega-themes)
project. You can set a theme to a plot by calling the `Tucan.set_theme/2` function. If no
theme set the default vega-lite theme is used. In all examples below the following example
plot is used:

```tucan
scatter =
  Tucan.scatter(:iris, "petal_width", "petal_length", tooltip: true)
  |> Tucan.color_by("species")
  |> Tucan.shape_by("species")

lines = Tucan.lineplot(:stocks, "date", "price", color_by: "symbol", x: [type: :temporal])

area =
  Tucan.area(:stocks, "date", "price", color_by: "symbol", mode: :normalize, x: [type: :temporal])

density = Tucan.density(:penguins, "Body Mass (g)", color_by: "Species", fill_opacity: 0.2)

strip =
  Tucan.stripplot(:tips, "total_bill", group_by: "day", style: :jitter)
  |> Tucan.color_by("sex")

boxplot = Tucan.boxplot(:penguins, "Body Mass (g)", color_by: "Species")
histogram = Tucan.histogram(:cars, "Horsepower", color_by: "Origin", fill_opacity: 0.5)

pie = Tucan.pie(:barley, "yield", "site", aggregate: :sum, tooltip: true)

donut = Tucan.donut(:barley, "yield", "site", aggregate: :sum, tooltip: true)

heatmap =
  Tucan.density_heatmap(:penguins, "Beak Length (mm)", "Beak Depth (mm)")

Tucan.vconcat(
  [
    Tucan.hconcat([scatter, lines, area]),
    Tucan.hconcat([density, Tucan.vconcat([strip, boxplot]), histogram]),
    Tucan.hconcat([pie, donut, heatmap])
  ]
)
|> VegaLite.config(legend: [disable: true])
|> VegaLite.resolve(:scale, color: :independent)

```

The following themes are currently supported:

### `:dark`

A dark theme [[source](https://github.com/vega/vega-themes/blob/main/src/theme-dark.ts)]

**Example:**

```vega-lite
{"$schema":"https://vega.github.io/schema/vega-lite/v5.json","config":{"axis":{"domainColor":"#fff","gridColor":"#888","tickColor":"#fff"},"background":"#333","legend":{"disable":true},"style":{"guide-label":{"fill":"#fff"},"guide-title":{"fill":"#fff"}},"title":{"color":"#fff","subtitleColor":"#fff"},"view":{"stroke":"#888"}},"resolve":{"scale":{"color":"independent"}},"vconcat":[{"hconcat":[{"data":{"url":"https://gist.githubusercontent.com/curran/a08a1080b88344b0c8a7/raw/0e7a9b0a5d22642a06d3d5b9bcbad9890c8ee534/iris.csv"},"encoding":{"color":{"field":"species"},"shape":{"field":"species"},"x":{"field":"petal_width","scale":{"zero":false},"type":"quantitative"},"y":{"field":"petal_length","scale":{"zero":false},"type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"point"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"line"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","stack":"normalize","type":"quantitative"}},"mark":{"fillOpacity":1,"line":false,"type":"area"}}]},{"hconcat":[{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"axis":{"title":"Body Mass (g)"},"field":"value","scale":{"zero":false},"type":"quantitative"},"y":{"field":"density","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.2,"orient":"vertical","type":"area"},"transform":[{"as":"Body Mass (g)","calculate":"toNumber(datum[\"Body Mass (g)\"])"},{"counts":false,"cumulative":false,"density":"Body Mass (g)","groupby":["Species"],"maxsteps":200,"minsteps":25}]},{"vconcat":[{"data":{"url":"https://raw.githubusercontent.com/mwaskom/seaborn-data/master/tips.csv"},"encoding":{"color":{"field":"sex"},"x":{"field":"total_bill","type":"quantitative"},"y":{"field":"day","type":"nominal"},"yOffset":{"axis":null,"field":"jitter","type":"quantitative"}},"mark":{"size":16,"type":"point"},"transform":[{"as":"jitter","calculate":"sqrt(-2*log(random()))*cos(2*PI*random())"}]},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"field":"Body Mass (g)","scale":{"zero":false},"type":"quantitative"},"y":{"field":"Species","type":"nominal"}},"mark":{"extent":1.5,"fillOpacity":1,"type":"boxplot"}}]},{"__tucan__":{"plot":"histogram"},"data":{"url":"https://vega.github.io/editor/data/cars.json"},"encoding":{"color":{"field":"Origin"},"x":{"bin":{"binned":true},"field":"bin_Horsepower","title":"Horsepower"},"x2":{"field":"bin_Horsepower_end"},"y":{"field":"count_Horsepower","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.5,"type":"bar"},"transform":[{"as":"bin_Horsepower","bin":true,"field":"Horsepower"},{"aggregate":[{"as":"count_Horsepower","op":"count"}],"groupby":["bin_Horsepower","bin_Horsepower_end","Origin"]}]}]},{"hconcat":[{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"arc"}},{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"innerRadius":50,"tooltip":true,"type":"arc"}},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"aggregate":"count","type":"quantitative"},"x":{"bin":true,"field":"Beak Length (mm)","type":"quantitative"},"y":{"bin":true,"field":"Beak Depth (mm)","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"rect"}}]}]}
```

### `:excel`

Chart theme modeled after `excel` [[source](https://github.com/vega/vega-themes/blob/main/src/theme-excel.ts)]

**Example:**

```vega-lite
{"$schema":"https://vega.github.io/schema/vega-lite/v5.json","config":{"arc":{"fill":"#4572a7"},"area":{"fill":"#4572a7"},"axis":{"bandPosition":0.5,"grid":true,"gridColor":"#000000","gridOpacity":1,"gridWidth":0.5,"labelPadding":10,"tickSize":5,"tickWidth":0.5},"axisBand":{"grid":false,"tickExtra":true},"background":"#fff","legend":{"disable":true},"line":{"stroke":"#4572a7","strokeWidth":2},"path":{"stroke":"#4572a7"},"range":{"category":["#4572a7","#aa4643","#8aa453","#71598e","#4598ae","#d98445","#94aace","#d09393","#b9cc98","#a99cbc"]},"rect":{"fill":"#4572a7"},"shape":{"stroke":"#4572a7"},"symbol":{"fill":"#4572a7","size":50,"strokeWidth":1.5}},"resolve":{"scale":{"color":"independent"}},"vconcat":[{"hconcat":[{"data":{"url":"https://gist.githubusercontent.com/curran/a08a1080b88344b0c8a7/raw/0e7a9b0a5d22642a06d3d5b9bcbad9890c8ee534/iris.csv"},"encoding":{"color":{"field":"species"},"shape":{"field":"species"},"x":{"field":"petal_width","scale":{"zero":false},"type":"quantitative"},"y":{"field":"petal_length","scale":{"zero":false},"type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"point"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"line"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","stack":"normalize","type":"quantitative"}},"mark":{"fillOpacity":1,"line":false,"type":"area"}}]},{"hconcat":[{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"axis":{"title":"Body Mass (g)"},"field":"value","scale":{"zero":false},"type":"quantitative"},"y":{"field":"density","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.2,"orient":"vertical","type":"area"},"transform":[{"as":"Body Mass (g)","calculate":"toNumber(datum[\"Body Mass (g)\"])"},{"counts":false,"cumulative":false,"density":"Body Mass (g)","groupby":["Species"],"maxsteps":200,"minsteps":25}]},{"vconcat":[{"data":{"url":"https://raw.githubusercontent.com/mwaskom/seaborn-data/master/tips.csv"},"encoding":{"color":{"field":"sex"},"x":{"field":"total_bill","type":"quantitative"},"y":{"field":"day","type":"nominal"},"yOffset":{"axis":null,"field":"jitter","type":"quantitative"}},"mark":{"size":16,"type":"point"},"transform":[{"as":"jitter","calculate":"sqrt(-2*log(random()))*cos(2*PI*random())"}]},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"field":"Body Mass (g)","scale":{"zero":false},"type":"quantitative"},"y":{"field":"Species","type":"nominal"}},"mark":{"extent":1.5,"fillOpacity":1,"type":"boxplot"}}]},{"__tucan__":{"plot":"histogram"},"data":{"url":"https://vega.github.io/editor/data/cars.json"},"encoding":{"color":{"field":"Origin"},"x":{"bin":{"binned":true},"field":"bin_Horsepower","title":"Horsepower"},"x2":{"field":"bin_Horsepower_end"},"y":{"field":"count_Horsepower","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.5,"type":"bar"},"transform":[{"as":"bin_Horsepower","bin":true,"field":"Horsepower"},{"aggregate":[{"as":"count_Horsepower","op":"count"}],"groupby":["bin_Horsepower","bin_Horsepower_end","Origin"]}]}]},{"hconcat":[{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"arc"}},{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"innerRadius":50,"tooltip":true,"type":"arc"}},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"aggregate":"count","type":"quantitative"},"x":{"bin":true,"field":"Beak Length (mm)","type":"quantitative"},"y":{"bin":true,"field":"Beak Depth (mm)","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"rect"}}]}]}
```

### `:five_thirty_eight`

Chart theme modeled after FiveThirtyEight [[source](https://github.com/vega/vega-themes/blob/main/src/theme-fivethirtyeight.ts)]

**Example:**

```vega-lite
{"$schema":"https://vega.github.io/schema/vega-lite/v5.json","config":{"arc":{"fill":"#30a2da"},"area":{"fill":"#30a2da"},"axis":{"domainColor":"#cbcbcb","grid":true,"gridColor":"#cbcbcb","gridWidth":1,"labelColor":"#999","labelFontSize":10,"labelPadding":4,"tickColor":"#cbcbcb","tickSize":10,"titleColor":"#333","titleFontSize":14,"titlePadding":10},"axisBand":{"grid":false},"background":"#f0f0f0","bar":{"binSpacing":2,"fill":"#30a2da","stroke":null},"group":{"fill":"#f0f0f0"},"legend":{"disable":true},"line":{"stroke":"#30a2da","strokeWidth":2},"path":{"stroke":"#30a2da","strokeWidth":0.5},"point":{"filled":true,"shape":"circle"},"range":{"category":["#30a2da","#fc4f30","#e5ae38","#6d904f","#8b8b8b","#b96db8","#ff9e27","#56cc60","#52d2ca","#52689e","#545454","#9fe4f8"],"diverging":["#cc0020","#e77866","#f6e7e1","#d6e8ed","#91bfd9","#1d78b5"],"heatmap":["#d6e8ed","#cee0e5","#91bfd9","#549cc6","#1d78b5"]},"rect":{"fill":"#30a2da"},"shape":{"stroke":"#30a2da"},"title":{"anchor":"start","fontSize":24,"fontWeight":600,"offset":20}},"resolve":{"scale":{"color":"independent"}},"vconcat":[{"hconcat":[{"data":{"url":"https://gist.githubusercontent.com/curran/a08a1080b88344b0c8a7/raw/0e7a9b0a5d22642a06d3d5b9bcbad9890c8ee534/iris.csv"},"encoding":{"color":{"field":"species"},"shape":{"field":"species"},"x":{"field":"petal_width","scale":{"zero":false},"type":"quantitative"},"y":{"field":"petal_length","scale":{"zero":false},"type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"point"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"line"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","stack":"normalize","type":"quantitative"}},"mark":{"fillOpacity":1,"line":false,"type":"area"}}]},{"hconcat":[{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"axis":{"title":"Body Mass (g)"},"field":"value","scale":{"zero":false},"type":"quantitative"},"y":{"field":"density","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.2,"orient":"vertical","type":"area"},"transform":[{"as":"Body Mass (g)","calculate":"toNumber(datum[\"Body Mass (g)\"])"},{"counts":false,"cumulative":false,"density":"Body Mass (g)","groupby":["Species"],"maxsteps":200,"minsteps":25}]},{"vconcat":[{"data":{"url":"https://raw.githubusercontent.com/mwaskom/seaborn-data/master/tips.csv"},"encoding":{"color":{"field":"sex"},"x":{"field":"total_bill","type":"quantitative"},"y":{"field":"day","type":"nominal"},"yOffset":{"axis":null,"field":"jitter","type":"quantitative"}},"mark":{"size":16,"type":"point"},"transform":[{"as":"jitter","calculate":"sqrt(-2*log(random()))*cos(2*PI*random())"}]},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"field":"Body Mass (g)","scale":{"zero":false},"type":"quantitative"},"y":{"field":"Species","type":"nominal"}},"mark":{"extent":1.5,"fillOpacity":1,"type":"boxplot"}}]},{"__tucan__":{"plot":"histogram"},"data":{"url":"https://vega.github.io/editor/data/cars.json"},"encoding":{"color":{"field":"Origin"},"x":{"bin":{"binned":true},"field":"bin_Horsepower","title":"Horsepower"},"x2":{"field":"bin_Horsepower_end"},"y":{"field":"count_Horsepower","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.5,"type":"bar"},"transform":[{"as":"bin_Horsepower","bin":true,"field":"Horsepower"},{"aggregate":[{"as":"count_Horsepower","op":"count"}],"groupby":["bin_Horsepower","bin_Horsepower_end","Origin"]}]}]},{"hconcat":[{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"arc"}},{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"innerRadius":50,"tooltip":true,"type":"arc"}},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"aggregate":"count","type":"quantitative"},"x":{"bin":true,"field":"Beak Length (mm)","type":"quantitative"},"y":{"bin":true,"field":"Beak Depth (mm)","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"rect"}}]}]}
```

### `:ggplot2`

Chart theme modeled after `ggplot2` [[source](https://github.com/vega/vega-themes/blob/main/src/theme-ggplot2.ts)]

**Example:**

```vega-lite
{"$schema":"https://vega.github.io/schema/vega-lite/v5.json","config":{"arc":{"fill":"#000"},"area":{"fill":"#000"},"axis":{"domain":false,"grid":true,"gridColor":"#FFFFFF","gridOpacity":1,"labelColor":"#7F7F7F","labelPadding":4,"tickColor":"#7F7F7F","tickSize":5.67,"titleFontSize":16,"titleFontWeight":"normal"},"group":{"fill":"#e5e5e5"},"legend":{"disable":true},"line":{"stroke":"#000"},"path":{"stroke":"#000"},"range":{"category":["#000000","#7F7F7F","#1A1A1A","#999999","#333333","#B0B0B0","#4D4D4D","#C9C9C9","#666666","#DCDCDC"]},"rect":{"fill":"#000"},"shape":{"stroke":"#000"},"symbol":{"fill":"#000","size":40}},"resolve":{"scale":{"color":"independent"}},"vconcat":[{"hconcat":[{"data":{"url":"https://gist.githubusercontent.com/curran/a08a1080b88344b0c8a7/raw/0e7a9b0a5d22642a06d3d5b9bcbad9890c8ee534/iris.csv"},"encoding":{"color":{"field":"species"},"shape":{"field":"species"},"x":{"field":"petal_width","scale":{"zero":false},"type":"quantitative"},"y":{"field":"petal_length","scale":{"zero":false},"type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"point"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"line"}},{"data":{"url":"https://vega.github.io/editor/data/stocks.csv"},"encoding":{"color":{"field":"symbol"},"x":{"field":"date","type":"temporal"},"y":{"field":"price","stack":"normalize","type":"quantitative"}},"mark":{"fillOpacity":1,"line":false,"type":"area"}}]},{"hconcat":[{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"axis":{"title":"Body Mass (g)"},"field":"value","scale":{"zero":false},"type":"quantitative"},"y":{"field":"density","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.2,"orient":"vertical","type":"area"},"transform":[{"as":"Body Mass (g)","calculate":"toNumber(datum[\"Body Mass (g)\"])"},{"counts":false,"cumulative":false,"density":"Body Mass (g)","groupby":["Species"],"maxsteps":200,"minsteps":25}]},{"vconcat":[{"data":{"url":"https://raw.githubusercontent.com/mwaskom/seaborn-data/master/tips.csv"},"encoding":{"color":{"field":"sex"},"x":{"field":"total_bill","type":"quantitative"},"y":{"field":"day","type":"nominal"},"yOffset":{"axis":null,"field":"jitter","type":"quantitative"}},"mark":{"size":16,"type":"point"},"transform":[{"as":"jitter","calculate":"sqrt(-2*log(random()))*cos(2*PI*random())"}]},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"field":"Species"},"x":{"field":"Body Mass (g)","scale":{"zero":false},"type":"quantitative"},"y":{"field":"Species","type":"nominal"}},"mark":{"extent":1.5,"fillOpacity":1,"type":"boxplot"}}]},{"__tucan__":{"plot":"histogram"},"data":{"url":"https://vega.github.io/editor/data/cars.json"},"encoding":{"color":{"field":"Origin"},"x":{"bin":{"binned":true},"field":"bin_Horsepower","title":"Horsepower"},"x2":{"field":"bin_Horsepower_end"},"y":{"field":"count_Horsepower","stack":null,"type":"quantitative"}},"mark":{"fillOpacity":0.5,"type":"bar"},"transform":[{"as":"bin_Horsepower","bin":true,"field":"Horsepower"},{"aggregate":[{"as":"count_Horsepower","op":"count"}],"groupby":["bin_Horsepower","bin_Horsepower_end","Origin"]}]}]},{"hconcat":[{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"tooltip":true,"type":"arc"}},{"data":{"url":"https://vega.github.io/editor/data/barley.json"},"encoding":{"color":{"field":"site"},"theta":{"aggregate":"sum","field":"yield","type":"quantitative"}},"mark":{"fillOpacity":1,"innerRadius":50,"tooltip":true,"type":"arc"}},{"data":{"url":"https://raw.githubusercontent.com/vega/vega-datasets/next/data/penguins.json"},"encoding":{"color":{"aggregate":"count","type":"quantitative"},"x":{"bin":true,"field":"Beak Length (mm)","type":"quantitative"},"y":{"bin":true,"field":"Beak Depth (mm)","type":"quantitative"}},"mark":{"fillOpacity":1,"type":"rect"}}]}]}
```

### `:google_charts`

Chart theme modeled after Google Charts [[source](https://github.com/vega/vega-themes/blob/main/src/theme-googlecharts.ts)]

**Example:**

```vega-lite
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```

### `:latimes`

Chart theme modeled after the Los Angeles Times [[source](https://github.com/vega/vega-themes/blob/main/src/theme-latimes.ts)]

**Example:**

```vega-lite
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```

### `:power_bi`

Chart theme modeled after Power BI [[source](https://github.com/vega/vega-themes/blob/main/src/theme-powerbi.ts)]

**Example:**

```vega-lite
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```

### `:quartz`

Chart theme modeled after Quartz [[source](https://github.com/vega/vega-themes/blob/main/src/theme-quartz.ts)]

**Example:**

```vega-lite
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```

### `:urban_institute`

Chart theme modeled after Urban Institute [[source](https://github.com/vega/vega-themes/blob/main/src/theme-urbaninstitute.ts)]

**Example:**

```vega-lite
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```

### `:vox`

Chart theme modeled after Vox [[source](https://github.com/vega/vega-themes/blob/main/src/theme-vox.ts)]

**Example:**

```vega-lite
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```

# `theme`

```elixir
@spec theme(name :: atom()) :: keyword()
```

Returns the configuration object for the given theme.

An exception will be raised if the theme name is invalid.

---

*Consult [api-reference.md](api-reference.md) for complete listing*