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Professional color grading: adjust brightness, contrast, saturation, hue, shadows, highlights, and temperature. Create cinematic looks with color curves.
Extract dominant, vibrant, or muted colors from images. Generate color schemes with HEX, RGB, HSL values and export palettes for design projects.
Crop and trim images with precision visual selection. Features aspect ratio presets (1:1, 16:9, 4:3), free-form cropping, grid overlays, and pixel-perfect adjustments for professional results.
Roughly 1 in 12 men and 1 in 200 women experience some form of color vision deficiency. If you design interfaces, marketing materials, or any visual content, there is a real chance a meaningful segment of your audience sees your work differently than you intend. This simulator lets you upload any image and instantly preview how it looks under protanopia, deuteranopia, tritanopia, and achromatopsia. Side-by-side comparison makes it straightforward to spot problem areas where color alone carries meaning. Test early, test often, and ship designs that work for everyone.
The simulator applies transformation matrices to each pixel, modeling how reduced or absent cone-cell responses alter perceived color. Protanopia and deuteranopia (red-blind and green-blind) are the most common forms, together accounting for roughly 99% of color vision deficiency cases. Tritanopia affects blue-yellow perception and is far rarer. Achromatopsia removes all color perception entirely. Because the processing runs in-browser via canvas operations, your images are never uploaded to any server.
Check UI mockups and web designs to verify that color is never the sole carrier of information.
Systematically verify designs against accessibility standards before release.
Ensure charts, graphs, and heatmaps remain readable under all vision conditions.
Confirm that your brand colors remain distinguishable across all deficiency types.
Show colleagues firsthand how users with color deficiency experience your product.
Start with deuteranopia — it is the most common form, affecting about 6% of males. Then move through protanopia and tritanopia for full coverage.
No. The simulation is rendered in real-time on a canvas element. Your uploaded file stays untouched.
Absolutely. Take a screenshot, upload it, and cycle through each simulation type. It is one of the quickest ways to audit a live interface.
They use established color transformation matrices from vision science research. While individual perception varies, they give a reliable approximation of how most affected users see color.
All processing happens directly in your browser. Your files never leave your device and are never uploaded to any server.