DARLINGPROJECTS

Dichromacy reference

Color Vision Test

Use this page as a stable reference when testing the Deutan filter. At 0% severity the left-hand rainbow should remain unchanged. At 100% Deutan, the filtered version of the left rainbow should move toward the appearance of the right-hand reference.

Rainbow comparison showing standard color vision on the left and a deuteranopia reference on the right
Original reference
Deutan reference
Original full-color rainbow

Original

This is the image to run through the live Deutan filter.

Reference appearance of the rainbow under deuteranopia simulation

Deutan reference

Use this as the visual comparison target at 100% severity.

Test URL: after deployment, open /color-vision-test.html in the dichromacy app. For the cleanest comparison, focus on the separate Original image and compare its filtered colors to the Deutan reference.