Convert color channels to single integer and back. Useful to get an id for a color.

const colorId = require('color-id');

colorId([.1, .5, .5, .1]); // 0x197f7f19

Get id for normalized to 0..1 rgb[a] channel values. Optionally pass normalized flag to indicate that values are normalized to 0..1 range, defaults to true.

Get color channels values from the color id. Optionally pass normalized flag to align values to 0..1 range.

color-interpolate — interpolate color over palette, colormap or gradient.
color-rgba — convert color string to rgba array.
color-alpha — change alpha channel for a color.