Developer guide

How to Check Color Contrast in CSS

Review the colors actually used in CSS, including state and surface changes.

What to check

Review the colors actually used in CSS, including state and surface changes. Start with the real input, state, or output you are working with rather than a generic example. A focused check prevents small details from becoming rework later.

A practical workflow

  1. Define the specific result you need before opening a tool.
  2. Use a small, representative sample and review the output in context.
  3. Keep the result only when it matches the requirement for the page, product, or campaign.

Use Contrast Check locally

TinyTask Lab provides a browser-first Contrast Check workflow for this task. It does not require an account, and the tool input stays in the current browser tab.

Open Contrast Check →

Next step

After completing this check, review the related guide below for another practical part of the same workflow.