ColorUI Prompt Palette Studio vs DuckColor

ColorUI Prompt Palette Studio turns natural-language design requests into color palettes and explains each color's role. It maps mood, temperature and context to OKLCH properties, arranging colors as primary brand tones, secondary accents and neutral backgrounds. You can give it color names or exact hex codes, lock those choices and generate matching tones around them. Exports include CSS custom properties, W3C design tokens and Tailwind themes, alongside SCSS, JSON, Style Dictionary, Swift UIColor and Android XML. The public API needs no signup or API key, supports CORS and allows 60 requests per minute; it accepts prompt-based generation, harmony rules or random mode, with random counts from 2 to 8. Prompts are evaluated statelessly and are not stored or tied to personal accounts. Palettes may be used personally or commercially without attribution. Integrations include Figma, VS Code, CLI, GitHub, Raycast and MCP. ColorUI also lists image color extraction, an accessibility checker and seven harmony modes. The free plan is available without signup.

DuckColor is a web-based color tool that creates palettes from a word, mood, or short prompt for websites, interfaces, brands, and creative projects. Each run produces two palette choices, each with a name, description, and HEX list. Users can set the number of colors, palette type, style, and color family across the described four-to-eight-color range. Image Picker extracts key colors from an uploaded image and can save a swatch image. Palette Studio supports iterative changes, constraints, version history, and PNG or table swatches ready for export. A color mixer blends colors by ratio and compares digital color-space results with a paint-style mix. Contrast checking supplies WCAG guidance, including AA and AAA. Individual HEX codes can be copied. The free plan costs nothing and needs no login, although rate limits or daily quotas may apply and change. Generated outputs are licensed for personal or commercial projects under the Terms.