On: What is Color Banding? And what is it not?

[kuschku]

And there is one alternative: 30bit (+alpha) colors.

But that’s currently only used by designers.

[exDM69 → kuschku]

30 bit color means 10 bits per channel equals 1024 discrete values. If you do a full-screen gradient from, say, red to black on a large resolution monitor, there will be color banding.

It's better than 24 bit color but doesn't solve the problem.

[kuschku → exDM69]

Current movies use 36 bit – that’s enough for 4K usually.