by steps
000000 000000
000000
7f7f7f 7f7f7f
7f7f7f
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
007f7f
7a8383 7a8383
7a8383
007fff 007fff
007fff
00ff00 00ff00
00ff00
00ff7f 00ff7f
00ff7f
768788 768788
768788
00ffff 00ffff
00ffff
7f0000 7f0000
7f0000
7f007f 7f007f
7f007f
728b8c 728b8c
728b8c
7f00ff 7f00ff
7f00ff
7f7f00 7f7f00
7f7f00
6e8f91 6e8f91
6e8f91
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7f7fff
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7fff7f 7fff7f
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7fffff 7fffff
7fffff
699396 699396
699396
ff0000 ff0000
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ff007f
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65979a 65979a
65979a
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ff7f00
ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
619b9f 619b9f
619b9f
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff
5da0a4 5da0a4
5da0a4