Pixels on back-lit screens are dark until lit by combinations of red, green, and blue. Hex numbers represent these combinations with a concise code.
Code Demands Precision
When web designers name a colour, they use the hexidecimal code.
Designers who understand how hex colours work can treat them as tools rather than mysteries.
This post helps learners understand how hex colour work and emphasises colour in code is "color" :-)
Via John Dalziel, Lynnette Van Dyke, vidistar