colr
Fast and simple color conversion
canvasutil
Pixel transformations and processing for canvas
pixel-change
Measure differences between 2 identically sized buffer arrays of gray, rgb, or rgba pixels.
simple-color-converter
This is a simple colors converter, works for almost any color. Has a built in color identifier for converting strings to color. Supported convert colors: from and to CMYK, grayscale, hex3, hex4, hex6, hex8, html, hsl, hsv, lab, pantone, ral, rgb, rgba, rg