IconVault's Color Wheel is an interactive HSL color picker for building real palettes. Drag around the wheel to set hue and saturation, slide lightness, then apply harmony modes like complementary, analogous, triadic, split-complementary, tetradic and square. Every swatch copies its hex code with one click. Completely free and runs fully in your browser.

Below the wheel you get a full tints and shades strip, from near-white to near-black, so a single brand color becomes a usable scale in seconds. Keyboard accessible, with a hex input if you already know your starting color.