by steps
000000 000000
000000
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7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
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7d7887 7d7887
7d7887
007fff 007fff
007fff
00ff00 00ff00
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00ff7f
7c728f 7c728f
7c728f
00ffff 00ffff
00ffff
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ff7f7f ff7f7f
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ff7fff
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ffff00 ffff00
ffff00
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ffff7f
ffffff ffffff
ffffff
764cc0 764cc0
764cc0