123,0,224
#
in steps
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000000
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0000ff
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00007f
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007f7f 007f7f
007f7f
1e00f7 1e00f7
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00ffff 00ffff
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d700c8 d700c8
d700c8
ffff00 ffff00
ffff00
ffff7f ffff7f
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ffffff ffffff
ffffff
f600c1 f600c1
f600c1