# note: Palette of 3 colors, so indices are 2 bits and 4 pixels share a
#   byte.
# expect: ok
# exercises: num_colors in 3..4 selects bits = 2, the middle packing
#   density. The byte 0xe4 holds indices 0, 1, 2, 3 least-significant first.
lossless
width 8
transforms color_indexing
palette_colors 0xff0000ff 0xff00ff00 0xffff0000
pixels 0x24 0x24