Accessible Chart Colors: Visualizations Everyone Can Read
Choose accessible chart colors that work for color-blind and low-vision users. Covers contrast, patterns, labels, and color-safe palettes.
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Tags: accessibility, color, design
Accessible Chart Colors: Make Data Visualizations Readable by All Charts and graphs are among the most color-dense elements in web interfaces. A bar chart with six series, a pie chart with five segments, a line chart with eight trends — all of these depend on color to distinguish categories. When the colors are inaccessible, the data becomes unreadable for a significant portion of your audience. Why Rainbow Palettes Fail The most common charting mistake is using a rainbow or hue-spectrum palette: red, orange, yellow, green, blue, purple. This palette looks vibrant and distinct to users with standard color vision. Under red-green color blindness, which affects 8% of men, red, orange, and green collapse into similar shades. Under protanopia, reds appear almost black. Compounding the…
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