by steps
000000 000000
000000
7f7f00 7f7f00
7f7f00
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
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007f7f 007f7f
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72821f 72821f
72821f
007fff 007fff
007fff
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00ff7f
66863f 66863f
66863f
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f 7f007f
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5a8a5e 5a8a5e
5a8a5e
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4e8e7e 4e8e7e
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42919d 42919d
42919d
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3695bd 3695bd
3695bd
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ff7fff ff7fff
ff7fff
2a99dc 2a99dc
2a99dc
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
1e9dfc 1e9dfc
1e9dfc