Color palette tool

Generates color palettes for site themes from a base color, ensures accessibility, and exports ready-to-use palette data for easy theme integration.

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About This Tool

This tool accepts a base color and outputs a complete palette along with accessibility guidance and export-ready tokens. It supports multiple harmony modes to produce cohesive color sets that align with intranet branding requirements. Outputs include hex color values, text color recommendations for readability, and CSS variable tokens for seamless integration into stylesheets.
The underlying logic converts between color spaces, applies hue-based generation strategies, and adjusts lightness to meet contrast targets. It also offers optional color-blind adjustments and dark-mode variants to preview alternative deployments.
Designed for UX designers, frontend developers, and site admins, it enables rapid theme iteration, ensures consistency across pages, and reduces manual tuning of individual swatches. The tool’s outputs are ready for direct use in CSS, JSON payloads, or design handoffs, supporting repeatable branding across intranet ecosystems.

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How to Use

Provide inputs: base_color_hex, palette_size, and harmony_mode.
Optionally set contrast_target and enable accessibility options.
Run calculation to generate the palette and tokens.
Review generated hex values, text color suggestions, and CSS variables.
Export as CSS variables and/or JSON for integration into your site.

Frequently Asked Questions

Find Quick Answers

What inputs are required?

Required inputs include base_color_hex (6-digit hex), palette_size (4–8), and harmony_mode (analogous, complementary, triadic, square). Optional inputs include contrast_target and feature toggles for neutrals or dark-mode variants.

What formats can be exported?

Exports include CSS variables (e.g., --sp-palette-0) and a JSON palette with hex and HSL values. Hex values are provided for direct stylesheet use, and CSS variables can be copied into design systems.

How is accessibility handled?

The tool computes contrast ratios against common backgrounds and selects foreground text colors to meet WCAG AA requirements (typically 4.5:1). If a target cannot be met, it suggests adjustments to tone or lightness while preserving harmony.

Can I customize for color blindness or dark mode?

Yes. Optional adjustments include color-blind-friendly tweaks and dark-mode variants. These allow you to preview and export palettes tailored to accessibility needs and different viewing contexts.

Need to run multiple calculations?

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