15,72,81
#
in steps
000000 000000
000000
1f9123 1f9123
1f9123
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f00
007f7f 007f7f
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1b7e2e
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00ff7f
176c3a 176c3a
176c3a
00ffff 00ffff
00ffff
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135a45 135a45
135a45
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ff7fff ff7fff
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031273 031273
031273
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff