121,7,128
#
in steps
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000000
0000ff 0000ff
0000ff
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00007f
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007f00
007f7f 007f7f
007f7f
1e01df 1e01df
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3c03bf 3c03bf
3c03bf
00ffff 00ffff
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d30d21 d30d21
d30d21
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
f20f02 f20f02
f20f02