Huetone

Huetone is a browser tool by Alexey Ardov for building colour palettes in the LCH colour space, where equal steps in lightness look equal across hues. Palettes appear as a grid of hues and shades with contrast scores in each cell, lightness, chroma and hue curves can be adjusted per swatch, and pairs are checked against both APCA and WCAG. Start with one hue's lightness curve to watch its contrast scores shift, then export the finished palette as Figma tokens or CSS variables.