Color Contrast Grid by EightShapes
This online tool tests if the color combos are compliant with WCAG 2.0 minimum contrast. I like using it to test color combinations for buttons and text colors on different background colors.
New on A11y Toolbox
A11y Toolbox is a curated collection of articles, tools, and resources around digital accessibility. Each resource is handpicked for clarity, usefulness, and real-world application, with a focus on helping designers and teams build more inclusive experiences.