15,72,120
#
in steps
000000 000000
000000
007f7f 007f7f
007f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
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00ff7f
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07637b
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00ffff
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7f007f
0b5579 0b5579
0b5579
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133a76 133a76
133a76
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1b1e72 1b1e72
1b1e72
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1f1171 1f1171
1f1171