Colorblind Simulator & Contrast Suite
Simulate color vision conditions on images and check WCAG typography contrast pass ratings.
Simulator Parameters
Load a graphic and select a simulation mode.
Image Vision Preview
Upload a photo to preview simulated outputs.
The Importance of Color Contrast in Accessible Design
Modern digital inclusion laws require websites and applications to satisfy standard **WCAG 2.1 accessibility criteria**. This ensures that individuals with low-vision or color-blindness can navigate and parse text interfaces cleanly. Contrast checks are calculated using the relative luminance ratio of the text color versus the background block color.
Standard WCAG AA requirements dictate a minimum contrast ratio of **4.5:1** for regular body typography and **3.0:1** for large header titles. The stricter WCAG AAA standard demands a **7.0:1** ratio for normal text and **4.5:1** for large fonts. Our suite provides real-time mathematical validation of these ratios to help designers configure accessible templates.
Frequently Asked Questions
We embed hardware-accelerated SVG matrix filters inside the document. The matrices recalculate individual pixel RGB channels to isolate red, green, or blue waves.
Yes. In the Contrast tab, you can use color pickers or type any standard 3-digit or 6-digit hex code directly (e.g. #FFFFFF) to calculate metrics.
All standard image extensions (PNG, JPG, JPEG, WEBP) are supported for local canvas uploads.