8,18,216
#
in steps
000000 000000
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070fdf 070fdf
070fdf
00007f 00007f
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0000ff
007f00 007f00
007f00
007f7f 007f7f
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0915d2 0915d2
0915d2
ffff00 ffff00
ffff00
ffff7f ffff7f
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ffffff ffffff
ffffff
0a16d1 0a16d1
0a16d1