Closest hex to #1f84b6 is #28b

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#
#28b

1f84b6

1f84b6

contains 28

028 128 228 280 281 282 283 284 285 286 287 288 289 28a 28b 28c 28d 28e 28f 328 428 528 628 728 828 928 a28 b28 c28 d28 e28 f28

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 2b

02b 12b 22b 2b0 2b1 2b2 2b3 2b4 2b5 2b6 2b7 2b8 2b9 2ba 2bb 2bc 2bd 2be 2bf 32b 42b 52b 62b 72b 82b 92b a2b b2b c2b d2b e2b f2b