SiteLearning & Craft · Color theory
Technical note defining colour-blind-safe qualitative, sequential and diverging palettes, with values and usage rules.
Why it’s a gem
The scientific source most 'accessible palette' tools quietly copy from
Free chapter preview explaining how to build a UI palette with defined shade ramps rather than lighten/darken functions.
Framework for choosing and applying UI colour: neutrals, one accent, saturation ranges and when to break the rules.
Stripe engineering post on building a colour system that guarantees contrast ratios while preserving brand hue relationships.
Long essay deriving an algorithm for generating accessible, perceptually even colour palettes, with interactive demos.
Article explaining why HSB beats hex for reasoning about UI colour, with rules for building consistent palettes.