Do I get this right, you want to use the colored plastic thingies to make a picture? They are pretty big, so I think dithering is no option. I would reduce the number of colors on the 24 Bit image until it fits the number of colors you got there in the pot. Then see which colors fit best to the ones on the image.
Reducing colors may be done with a graphics app. You can also do it in Blitz code, eg:
rgb=readpixelfast(x,y) and $FFFFFF
writepixelfast x,y, rgb and %111100001111000011110000
this will erase the lower significant 4 bits of each channel, resulting in less color tones.
Reducing colors may be done with a graphics app. You can also do it in Blitz code, eg:
rgb=readpixelfast(x,y) and $FFFFFF
writepixelfast x,y, rgb and %111100001111000011110000
this will erase the lower significant 4 bits of each channel, resulting in less color tones.