Tubism works in the upper reaches of the value scale, creating an atmosphere of brightness and expansiveness. Built on cool foundations: the palette favours the blue-cyan-green arc. Chroma is held at a comfortable level - distinct colours, but no single hue is allowed to overwhelm. The chromatic peak belongs to #D4D06D, and at 47.1% it dominates, not decorates. The palette spans 40 value units: a measured range that delivers coherence over drama. High luminosity and cool temperature suggest the plein-air condition: unfiltered daylight and open sky.