XYZ (or Yuv) is also simple, since it is a single 3x3 matrix conversion away from RGB and it is relevant to huuman perception rather than display capability. In

XYZ (or Yuv) is also simple, since it is a single 3x3 matrix conversion away from RGB and it is relevant to huuman perception rather than display capability. In some cases people may not notice, but it others RGB-NN is clearly not the best... so why not try a bit harder, when it's a few lines of code and opcodes.