Closest hex to #51B7D6 is #5bd

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#5bd

51B7D6

51B7D6

contains 5b

05b 15b 25b 35b 45b 55b 5b0 5b1 5b2 5b3 5b4 5b5 5b6 5b7 5b8 5b9 5ba 5bb 5bc 5bd 5be 5bf 65b 75b 85b 95b a5b b5b c5b d5b e5b f5b

contains bd

0bd 1bd 2bd 3bd 4bd 5bd 6bd 7bd 8bd 9bd abd bbd bd0 bd1 bd2 bd3 bd4 bd5 bd6 bd7 bd8 bd9 bda bdb bdc bdd bde bdf cbd dbd ebd fbd

contains 5d

05d 15d 25d 35d 45d 55d 5d0 5d1 5d2 5d3 5d4 5d5 5d6 5d7 5d8 5d9 5da 5db 5dc 5dd 5de 5df 65d 75d 85d 95d a5d b5d c5d d5d e5d f5d