Color theory
Warm and cool colors: a visual guide to mood
Temperature is a useful design relationship: not a rulebook, but a way to make a palette feel closer, calmer, louder, or more spacious.
Temperature is a relationship, not a label
Warm colors often carry visual energy: reds, oranges, and yellows can advance, glow, or make a surface feel closer. Cool colors—blues, blue-greens, and some violets—tend to recede, settle, or give a composition more air.
The useful move is to compare colors inside the same palette. A muted terracotta can feel warm beside a blue-grey, while the same terracotta can feel quiet beside a saturated orange.
Build the mood before you tune the numbers
Choose one anchor color, then add a neighboring temperature for support. Keep the strongest contrast for one intentional role—an action, a detail, or the edge that gives the palette its shape.
CULRS makes that first pass tactile: generate a palette, lock the colors that feel right, and let the remaining spaces find a useful balance.