https://github.com/beilinson/chroma-harmony.js

A minimal Color Harmony library built on top of chroma-js
https://github.com/beilinson/chroma-harmony.js

Last synced: 29 days ago
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A minimal Color Harmony library built on top of chroma-js

• Host: GitHub
• URL: https://github.com/beilinson/chroma-harmony.js
• Owner: Beilinson
• License: mit
• Created: 2023-05-31T17:47:19.000Z (over 1 year ago)
• Default Branch: main
• Last Pushed: 2023-09-26T10:08:47.000Z (about 1 year ago)
• Last Synced: 2024-10-07T21:31:16.843Z (30 days ago)
• Language: TypeScript
• Homepage: https://beilinson.github.io/chroma-harmony.js/demo/
• Size: 227 KB
• Stars: 2
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# chroma-harmony.js

A [tiny](https://bundlephobia.com/package/chroma-harmony) TypeScript Color Harmony library built on top of [chroma-js](https://www.npmjs.com/package/chroma-js).

Try out with the interactive [online editor](https://beilinson.github.io/chroma-harmony.js/visual/)!

## Color Palettes

Use it in order to quickly generate [sequential, diverging, or qualitative](https://colorbrewer2.org) brewer color scales for data visualization:

![A table of 7 Color Harmonies](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/brewer.png)

Or Generate more general color palettes using simple color harmonies like complementary or analogous:

![A table of 7 Color Harmonies](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/seven-color-harmonies.jpg)

## Color Spaces

Since this library uses `chroma-js` objects for color manipulations, we gain full advantage of advanced

color spaces for manipulating colors to generate automatic color palettes.

For example, a Triadic color harmony with a Red/Green/Blue may look like this using the generic HSL workflow:

![A triadic Red/Green/Blue harmony](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/triadic_hsl.png)

And like this using the CSS4 `oklch` color space:

![A triadic Red/Green/Blue harmony in oklch](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/triadic_oklch.png)

If using in a data visualization context, choosing the `oklch` triad may be preferred, as can be clearly seen in the following comparison where the `hsl` trid (on the left) makes the blue bars stand out much more against the red and green.

This is in contrast to the `oklch` triad (on the right), where no color is visually stronger than the other 2.

![A triadic Red/Green/Blue harmony in hsl](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/triadic_hsl_demo.png) ![A triadic Red/Green/Blue harmony in oklch](https://raw.githubusercontent.com/beilinson/chroma-harmony.js/main/assets/triadic_oklch_demo.png)

## Install

First install the `chroma-js` peer-dependency:

```

npm install chroma-js

```

```

npm install chroma-harmony

```

## API

```ts

import Harmony from 'chroma-harmony';

/**

 * {chroma.InterpolationMode} mode: https://gka.github.io/chroma.js/#scale-mode

 * {boolean} correctLightness: https://gka.github.io/chroma.js/#scale-correctlightness

 */

const generator = new Harmony();

// Generate a chroma.Scale object using a complementary color palette

const complementary = generator.complementary(0x3182bd);

// Generate a 3 color equidistant triadic color palette

const triadic = generator.triadic(0xf03b20); // [chroma.Color, chroma.Color, chroma.Color]

```

## TypeScript

To use in TypeScript, don't forget to install the `chroma-js` typings:

```

npm install @types/chroma-js

```