by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
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007f7f
72897c 72897c
72897c
007fff 007fff
007fff
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00ff7f
66947a 66947a
66947a
00ffff 00ffff
00ffff
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599e78
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40b373
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34be71
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ff7f7f
ff7fff ff7fff
ff7fff
27c86f 27c86f
27c86f
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1bd36d 1bd36d
1bd36d