by steps
000000 000000
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7f7f7f
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00007f
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8b8688 8b8688
8b8688
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00ff7f
978e91 978e91
978e91
00ffff 00ffff
00ffff
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7f007f
a3969a a3969a
a3969a
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ff7f7f ff7f7f
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ff7fff ff7fff
ff7fff
d4b5be d4b5be
d4b5be
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
e1bdc7 e1bdc7
e1bdc7