Canvas Based Interactive Gradients Animation Library – Granim.js
Granim.js is a lightweight, dependency-free JavaScript library which helps create configurable, interactive gradients animations on an HTML5 canvas element.
Color
Configurable Color Transition Library – sweep.js
sweep.js is a vanilla JavaScript library which enables you to create smooth color transitions on any elements.
Extracting The Average Color From Images Or Videos – Fast Average Color
Fast Average Color is a modern (ES6) JavaScript library which lets you extract the Average Color from images, videos or canvas elements.
Create Animated Gradient Background With JavaScript – gradientify.js
gradientify.js is a small JavaScript plugin which makes use of plain HTML and CSS to create an animated gradient background for any container element.
JavaScript Library To Manipulate And Convert Colors – kwulers
kwulers is a lightweight (~6kb minified) JavaScript color conversion library used to converts colors between RGB, RGBA, HEX, HSL, CMYK, and ColorName.
Get Tints & Shades Of Colors – Reshader
Reshader is a lightweight and customizable color palette generator that provides a function to extract the shades of a color you specify.
180+ Gradient Colors In Pure CSS3 – webgradients
webgradients is a lightweight CSS library which provides 180+ linear-gradient colors for backgrounds, text and anywhere you want.
Minimal HSLA Color picker With Pure JavaScript
A super simple, interactive HSLA (HUE, SATURATION, LIGHT and ALPHA) color picker with slider controls implemented in pure JavaScript.
Pure JavaScript Smooth Gradient Generator
A pure JavaScript library that allows you to draw smooth gradients on Html5 canvas element.
JavaScript Plugin To Colorize Letters, Words And Lines – ColorDivideJS
ColorDivideJS is a native JavaScript library that applies different colors to letters, words and even lines.