# Colorblind-Safe Workflows

Canonical URL: https://colorcurio.us/library/collections/colorblind-safe-workflows
Source type: Collection

## Summary

Most accessibility work focuses on text contrast, which is the easy half of the problem. These entries are about the harder half: making sure two distinct semantic categories stay distinct after a CVD transform, picking sequential palettes that survive deuteranopia, and auditing palettes you've already shipped. The Viz Palette CVD simulator is the quickest sanity check; ColorBrewer remains the gold standard for choropleths.

## Entries

1. [Understanding WCAG Color Contrast](https://www.w3.org/WAI/WCAG21/Understanding/contrast-minimum.html) — Comprehensive guide to WCAG contrast requirements and how to test for accessibility compliance. — https://colorcurio.us/library/a11y-color-contrast
2. [Viz Palette](https://projects.susielu.com/viz-palette) — Build and evaluate color palettes for data visualization with colorblind simulation. — https://colorcurio.us/library/viz-palette
3. [Contrast Ratio Calculator](https://contrast-ratio.com/) — Simple, elegant tool by Lea Verou for checking color contrast against WCAG requirements. — https://colorcurio.us/library/contrast-ratio
4. [Color Review](https://color.review/) — Evaluate your color palette with simulations for various types of color blindness. — https://colorcurio.us/library/color-review
5. [ColorBrewer 2.0](https://colorbrewer2.org/) — The classic tool for selecting color schemes for maps and data visualization, based on research by Cynthia Brewer. — https://colorcurio.us/library/colorbrewer