Pick a base color and generate a matching palette.
Check contrast ratio against WCAG accessibility standards.
Build a CSS flexbox layout visually.
Generate a self-contained, responsive HTML banner/ad snippet.
Scale a dimension to keep an aspect ratio, or find the ratio.
See images and palettes as people with colour vision deficiency do.
Convert colour codes between HEX, RGB and CMYK with a live preview.
Donaldson R F