Closest hex to #0397b9 is #09b

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#09b

0397b9

0397b9

contains 09

009 090 091 092 093 094 095 096 097 098 099 09a 09b 09c 09d 09e 09f 109 209 309 409 509 609 709 809 909 a09 b09 c09 d09 e09 f09

contains 9b

09b 19b 29b 39b 49b 59b 69b 79b 89b 99b 9b0 9b1 9b2 9b3 9b4 9b5 9b6 9b7 9b8 9b9 9ba 9bb 9bc 9bd 9be 9bf a9b b9b c9b d9b e9b f9b

contains 0b

00b 0b0 0b1 0b2 0b3 0b4 0b5 0b6 0b7 0b8 0b9 0ba 0bb 0bc 0bd 0be 0bf 10b 20b 30b 40b 50b 60b 70b 80b 90b a0b b0b c0b d0b e0b f0b