Chromatic vs tonal gradients
A tonal gradient moves along a single hue's lightness axis — light blue fading to dark blue. Tonal gradients are safe, predictable, and low-risk; they're also less visually interesting. A chromatic gradient moves across hue space — warm blue shifting through violet toward rose. Chromatic gradients carry more emotional energy and visual tension, but they need careful execution to avoid the muddy intermediate zone where colors mix poorly. Moving through HSL or OKLab color space rather than RGB is essential: an HSL gradient from blue to red produces clean violet intermediates, while an RGB lerp produces a washed-out desaturated muddle.
