Figure color check
Runs in your browser. Your figure is never uploaded.
Contrast
Drop a figure
or paste it, or
PNG · JPG · WebP · SVG
How the check works
-
Find the ink
The background is the most common color along the edge. Ink is every pixel that matches its neighbors.
-
Group the colors
Ink is clustered into the figure’s colors. Blurred edges join their color; lines and filled areas are told apart.
-
Simulate vision
Each color as seen with deuteranopia, protanopia and tritanopia.
-
Compare every pair
Two colors closer than ΔE 8 (CIEDE2000) clash. Thin lines and small markers need more difference than large areas.
-
Check contrast
Lines and markers need 3:1 against the background. Grays and filled areas are not judged.
-
Suggest colors
The closest safe colors that keep every pair apart in all four views.