Colour decisions.
WHAT COLOUR DOES
Signals meaning Creates emphasis Groups related things Carries brand
WHAT TO DECIDE
A small palette: a primary, a neutral range, and a few for meaning.
WHAT MEANING COLOURS ARE FOR
Success, warning, error, information.
WHAT TO KEEP CONSISTENT
The same colour meaning the same thing everywhere.
WHAT TO AVOID
Many colours with no assigned meaning Colour as the only way something is communicated Bright colours over large areas
THAT SECOND POINT
Anyone who cannot distinguish those colours receives no information.
Always pair colour with text, shape or position.
WHAT NEUTRALS DO
Most of the work.
A good interface is mostly neutral, with colour used sparingly for emphasis.
WHAT TO CHECK
Contrast against backgrounds How it looks in bright sunlight How it appears on a cheap screen
THAT LAST POINT
Colours that look subtle on a good monitor become invisible elsewhere.
WHAT TO TEST
In greyscale, to check nothing depends on colour alone.
