Closest hex to #3186B7 is #38b

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#
#38b

3186B7

3186B7

contains 38

038 138 238 338 380 381 382 383 384 385 386 387 388 389 38a 38b 38c 38d 38e 38f 438 538 638 738 838 938 a38 b38 c38 d38 e38 f38

contains 8b

08b 18b 28b 38b 48b 58b 68b 78b 88b 8b0 8b1 8b2 8b3 8b4 8b5 8b6 8b7 8b8 8b9 8ba 8bb 8bc 8bd 8be 8bf 98b a8b b8b c8b d8b e8b f8b

contains 3b

03b 13b 23b 33b 3b0 3b1 3b2 3b3 3b4 3b5 3b6 3b7 3b8 3b9 3ba 3bb 3bc 3bd 3be 3bf 43b 53b 63b 73b 83b 93b a3b b3b c3b d3b e3b f3b