It took me a while to figure out how to easily convert images to the 8 colors for Amazfit BIP.
here is an easy way:
1. once you finished your image in GIMP, open 'change foreground color'.
2. put the 8 allowed colors in the color history
the colors are: 000000 (black) 0000FF ( cyan) 00FF00 (green) FF0000 (red) 00FFFF (blue) FF00FF (purple) FFFF00 (yellow) FFFFFF (white)
remove all other colors in the color history
3. go to image - mode - indexed, choose 'use custom palet' under colormap. click on the colored icon (left from 'web') and select color history. Apply changes
4. done
ps: i wanted to add screenshots, but get an error on the postimages dot org link...