On: How to (and how not to) fix color banding

[rsaxvc]

Another GPU friendly approach is mixing with blue noise. I used it in a display driver with XRGB8888 framebuffer and Y2 pixels, and it worked great.

[quag → rsaxvc]

When generating images also mix in a little blue noise to avoid banding effects. A simple lookup table goes a long way. I found it worked much better than adding uniformly random noise (white noise) to each pixel.