15,17,191
#
in steps
000000 000000
000000
1f23ff 1f23ff
1f23ff
00007f 00007f
00007f
0000ff 0000ff
0000ff
007f00 007f00
007f00
007f7f 007f7f
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1b1eef 1b1eef
1b1eef
007fff 007fff
007fff
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00ff00
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00ff7f
171adf 171adf
171adf
00ffff 00ffff
00ffff
7f0000 7f0000
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7f007f 7f007f
7f007f
1315cf 1315cf
1315cf
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0f11bf
7f7fff 7f7fff
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0b0daf 0b0daf
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ff7f7f ff7f7f
ff7f7f
ff7fff ff7fff
ff7fff
03048f 03048f
03048f
ffff00 ffff00
ffff00
ffff7f ffff7f
ffff7f
ffffff ffffff
ffffff