Red–green expression heatmap
Check an expression figure before submission.
Expression Atlas E-MTAB-5214 · CC BY 4.0Colorblind Simulator
FigranUpload a figure to see how readers with color vision deficiency see it, and which colors merge.
- PNG, TIFF, SVG
- Protan, deutan, tritan
- Stays in your browser
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Simulation
Merged colors · Deuteranopia
No merged colors found among 0 main colors.
Colorblind simulator examples: heatmaps, line charts and microscopy
Line chart with red and green series
Compare diet trends with overlapping colors.
R datasets: ChickWeightJet and viridis elevation maps
Compare two color scales on the same terrain.
R datasets: volcanoRed and green fluorescence overlay
Try Red → magenta on overlapping channels.
Illustrative imageRisk of bias traffic lights
Inspect judgments in a review figure.
Illustrative judgments; robvis default colorsOkabe–Ito iris scatter plot
Compare species with distinct accessible colors.
R datasets: irisHow to check a figure for color blindness
1Upload
Choose or paste a figure from your device.
2Compare views
Compare the original with simulated color vision.
3Fix merged colors and download
Highlight a pair, adjust the source figure, and download a simulation.
Protanopia, deuteranopia and tritanopia in figures
1Protanopia can make green and orange series difficult to distinguish.
2Deuteranopia can make red and green series difficult to distinguish.
3Tritanopia can make green and turquoise series difficult to distinguish.
4Grayscale can merge colors with similar relative luminance.
Red–green color blindness in fluorescence images
Change the red channel to magenta while keeping green: the blue contribution separates the channels for many readers. If the image already contains blue, the channels will mix.
Colorblind simulator FAQ
How accurate is color blindness simulation?
The colorblind simulator uses the Machado 2009 physiological model to approximate color vision deficiency. Individual vision varies, and tritan simulation is less precise. Grayscale approximates print and only roughly approximates achromatopsia.
How common is color vision deficiency?
Among people of Northern European ancestry, approximately 8% of men and 0.5% of women have red–green color vision deficiency (Wong 2011).
What does the severity slider change?
It changes the simulated severity of color vision deficiency. At 100%, the model represents dichromacy.
Which colors should I avoid in scientific figures?
Check red–green pairs and rainbow scales. Consider Okabe–Ito colors or viridis, and add redundant symbols or labels. Explore color palettes.
How do I fix a red–green fluorescence image?
Use Red → magenta here, or set the red channel to magenta in your imaging software.
Does it check symbols and line styles?
No. It checks color differences only; also use shapes, line styles and direct labels.
Is my image uploaded?
No. Your image does not leave your browser; processing happens in browser memory.
Which file types work?
PNG, JPEG, WebP, the first frame of GIF, BMP, SVG and supported TIFF images work. Export PDF or unsupported TIFF files as PNG.
Check your figure
Compare the colors in your figure before sharing it.