Closest hex to #009900 is #090

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#
#090

009900

009900

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 90

090 190 290 390 490 590 690 790 890 900 901 902 903 904 905 906 907 908 909 90a 90b 90c 90d 90e 90f 990 a90 b90 c90 d90 e90 f90

contains 00

000 001 002 003 004 005 006 007 008 009 00a 00b 00c 00d 00e 00f 100 200 300 400 500 600 700 800 900 a00 b00 c00 d00 e00 f00