Chroma.js
JavaScript library for all kinds of color manipulations
...Aside from that, chroma.js can also help you generate nice colors using various methods, for instance to be used in color palette for maps or data visualization. The first step is to get your color into chroma.js. That's what the generic constructor chroma() does. This function attempts to guess the format of the input color for you. For instance, it will recognize any named color from the W3CX11 specification. If there's no matching named color, chroma.js checks for a hexadecimal string. It ignores case, the # sign is optional, and it can recognize the shorter three letter format as well. ...