Color Palette Tool

Generates cohesive color palettes from a base color using harmony rules for designers, UI teams, and branding professionals.

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About This Tool

Generates cohesive color palettes from a base color using established color harmony rules. The tool targets designers, UI developers, branding teams, and marketing professionals who need rapid, repeatable color schemes that align with brand guidelines. By starting from a single base color, it ensures consistency across interfaces, dashboards, print assets, and digital campaigns. It outputs a list of hex colors ready for use in design systems and CSS tokens.\n
\nConceptually, the tool converts the base color into a perceptual color space (HSL) and applies categorical hue offsets based on the chosen harmony: analogous, complementary, triadic, or tetradic. It preserves relative saturation and lightness, then optionally shifts these attributes to emphasize vibrancy or accessibility. The result is a palette where color relationships are predictable rather than ad hoc, enabling faster iterations and clearer brand expression.\n
\nAdvanced capabilities include optional saturation and lightness deltas, accessibility checks against WCAG contrast thresholds, and the ability to export as CSS variables or JSON for developer tooling. The algorithm clamps values to valid ranges and handles edge cases such as grayscale base colors, where hue offsets have minimal impact but relationships remain defined.\n
\nUse cases span brand refresh planning, UI theming for apps and dashboards, marketing collateral colorization, and asset generation for social media. Its differentiator is a straightforward, math-based approach that preserves color harmony while exposing practical outputs for implementation teams. By combining precise domain logic with export options, it reduces the need for manual palette tweaking and accelerates design-to-code handoffs.

How to Use

  1. Provide inputs: base_color hex, palette_size (3–
  2. , harmony_type (analogous, complementary, triadic, tetradic).
  3. Optionally adjust saturation_delta and lightness_delta in percent.
  4. Run generation to produce the hex color list.
  5. Review the palette for color relationships and accessibility notes.
  6. Copy or export hex values as CSS variables or JSON.
How to use color palette tool

Frequently Asked Questions

Find Quick Answers

What is the main output of the tool?
The tool outputs a cohesive set of hex color codes derived from a base color using selected harmony rules. It helps maintain brand consistency across UI and marketing materials and can export values for CSS, design systems, or JSON-based workflows.
What inputs are accepted?
Inputs include a base_color hex code, palette_size (3–8), harmony_type (analogous, complementary, triadic, tetradic), and optional saturation_delta and lightness_delta. Outputs are hex color codes, with optional CSS variable or JSON export formats.
Does the tool check accessibility?
The basic output provides color relationships and hex values. In advanced usage, you can apply WCAG-based contrast checks to assess readability against a chosen background. Notifications highlight potential contrast issues for critical pairs.
Can I export the palette to CSS or JSON?
Yes. The tool supports exporting the generated hex palette as CSS variables, or as a JSON payload suitable for design systems, theming engines, or developer tooling integrations.

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