Color swatch tool

A color swatch tool generates cohesive palettes from a base color, helping designers, developers, and brands explore harmony, accessibility, and branding consistency quickly.

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About This Tool

This tool computes color palettes from a base color, delivering cohesive swatches for design systems, UI, branding, and accessibility-focused projects. Target users include web designers, product teams, frontend developers, and marketing teams seeking consistent color language.
Conceptually, it converts the base color into a defined color space, applies palette generation rules (analogous, complementary, triadic, or monochrome), and outputs a set of hex and RGB values. It performs contrast checks against accessibility guidelines to help ensure readability.
Unique value includes offline computations (no external color services), deterministic results for a given input, and options to specify contrast targets, tone ranges, and saturation caps. It also exposes a structured data output suitable for design tokens and style sheets.
Use cases include creating a brand-ready palette from a logo color, evaluating accessibility, generating light and dark variants, and exporting palettes to JSON or CSS variables for implementation.

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How to Use

Provide inputs: base color hex (#RRGGBB or RGB), palette mode (analogous, complementary, triadic, monochrome), and number of swatches (2–
.
Choose constraints: set saturation/brightness caps or contrast targets if available.
Run generation: compute hex and RGB values for each swatch and their relationships.
Review outputs: inspect swatch list, see color relationships, and examine contrast scores if shown.
Export: copy JSON tokens or CSS variables for design systems or codebases.
Iterate: adjust mode or target tones to refine harmony and accessibility.

Frequently Asked Questions

Find Quick Answers

What inputs are required?

At minimum provide a base color in hex (#RRGGBB) or RGB. Optional inputs include palette mode, swatch count, and secondary constraints such as saturation bounds or contrast targets. Validations ensure hex format and numeric ranges for counts.

What outputs are provided?

The tool returns an ordered list of swatches with hex and RGB values, palette metadata (mode, count), and optional contrast scores. Outputs can be exported as JSON tokens or CSS variables for integration into design systems and code.

Can outputs be integrated into design tokens?

Yes. The tool exports structured data suitable for design tokens, including JSON arrays and key-value mappings. It can be consumed by build pipelines to generate CSS variables, theme files, or token catalogs in design systems.

How is accessibility considered?

Contrast between text and background is evaluated against standard targets (for normal text, a minimum of 4.5:1; for large text, 3:1). The tool suggests adjusted tones or additional swatches to meet accessibility criteria.

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