Color

• Color Safe – Accessible color palettes based on WCAG Guidelines of text and background contrast ratios
• Contrast Grid – Test BG and FG colors
• Accessible Colors
• Accessible color palette builder – Build an accessible color palette
• Color Cube Color Checker – Tool that checks color combinations for accessibility, and lets you adjust colors until they pass. Great for tweaking brand colors.

Charts

• Designing Accessible Data Visualizations – An intro to designing accessible data visualizations
• Fizz Studio Software – Create Accessible Data Visualizations