OmniColors — Free Online Color Tools for Designers & Developers

Professional color tools used by designers, developers, and artists worldwide. Generate harmonious palettes, create CSS gradients, pick colors with HEX/RGB/HSL values, mix pigments, check WCAG contrast ratios, and explore 300+ named colors — all free, no sign-up required.

Color Palette Generator

Create beautiful, harmonious color palettes from a single seed color. Choose from 6 color harmony modes — complementary, analogous, triadic, tetradic, split complementary, and monochromatic. Perfect for UI design, brand identity, illustration, and data visualization. Every palette is accessible with one-click HEX copy.

Seed Color (optional)

Colors

Harmony