# Colors

Map color scales strongly impact the interpretation of a map and impact its accessibility, legibility, and visual interest. WebGeoDa provides a collection of helpful built-in color scaling standards, and also allows for any custom color scale to be added.

## Color Format

All color scales should be arrays of RGB values, like so:

```javascript
const myColorScale = [
    [0,0,0], //r, g, b
    [40,40,40],
    [80,80,80],
    [140,140,140],
    [220,220,220]
]
```

## ColorBrewer

ColorBrewer scales, designed by the immeasurable Cynthia Brewer, are available for convenient use in WebGeoDa. Preview these scales below:

{% embed url="<https://colorbrewer2.org/#type=sequential&scheme=BuGn&n=3>" %}

When using ColorBrewer scales, you can specify a given scale as shown below:

```javascript
const variables = [{
    variable: 'myVar',
    numerator: 'myData',
    nProperty: 'myColumn',
    binning: 'naturalBreaks',
    colorScale: colors.colorBrewer.Reds
}]
```

## GeoDa Spatial Statistics

The official GeoDa color scales are available under `colors.geoda` and include color scales for LISA data and hinge breaks.