Closest hex to #3b12db is #31d

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#31d

3b12db

3b12db

contains 31

031 131 231 310 311 312 313 314 315 316 317 318 319 31a 31b 31c 31d 31e 31f 331 431 531 631 731 831 931 a31 b31 c31 d31 e31 f31

contains 1d

01d 11d 1d0 1d1 1d2 1d3 1d4 1d5 1d6 1d7 1d8 1d9 1da 1db 1dc 1dd 1de 1df 21d 31d 41d 51d 61d 71d 81d 91d a1d b1d c1d d1d e1d f1d

contains 3d

03d 13d 23d 33d 3d0 3d1 3d2 3d3 3d4 3d5 3d6 3d7 3d8 3d9 3da 3db 3dc 3dd 3de 3df 43d 53d 63d 73d 83d 93d a3d b3d c3d d3d e3d f3d