Color Brewer Tool

The Color Brewer Tool generates color palettes by user-defined counts and constraints, supporting color spaces such as RGB, HSL, and LAB, and scheme types including categorical, sequential, and diverging. It outputs ordered HEX color lists suitable for UI components, charts, branding, and data visualizations, with deterministic results to enable reproducibility across projects.
Conceptually, it maps inputs to a harmony strategy and computes a sequence of colors that satisfy the specified ranges for hue, saturation, and lightness. The generator builds a circular, angle-based partition of color space into evenly spaced slots, assigns colors according to the chosen scheme, and preserves perceptual balance by preferring evenly distributed luminance. The tool also provides optional accessibility signals and suggested substitutions to meet contrast targets.
Beneficiaries include UI designers, front-end developers, product managers, and data visualization engineers who need consistent palettes quickly. Unique value comes from constraint-driven generation, support for multiple color models, and easy export of ready-to-use HEX values. It reduces trial-and-error, supports branding consistency, and facilitates rapid iteration on color choices for dashboards and interfaces.
Core features and use cases: input controls for color_count, model, scheme, and ranges; output as ordered HEX values; optional contrast checks; export options in HEX, JSON, or CSV; and reproducible palettes for A/B testing and documentation.