Some time ago I did a test for mobile screens. I used 64 color images at 2 times the size they had to be (for high-res displays). High-res devices don't scale

Some time ago I did a test for mobile screens. I used 64 color images at 2 times the size they had to be (for high-res displays). High-res devices don't scale those images, but because the pixels are so small 64 color images are still looking good. Related to this post: small displays will downscale the image to 50%. I noticed that most modern browsers use a nice reduction algorithm so the interpolation of 64 colors is also looking good.