Closest hex to #66dd00 is #6d0

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#6d0

66dd00

66dd00

contains 6d

06d 16d 26d 36d 46d 56d 66d 6d0 6d1 6d2 6d3 6d4 6d5 6d6 6d7 6d8 6d9 6da 6db 6dc 6dd 6de 6df 76d 86d 96d a6d b6d c6d d6d e6d f6d

contains d0

0d0 1d0 2d0 3d0 4d0 5d0 6d0 7d0 8d0 9d0 ad0 bd0 cd0 d00 d01 d02 d03 d04 d05 d06 d07 d08 d09 d0a d0b d0c d0d d0e d0f dd0 ed0 fd0

contains 60

060 160 260 360 460 560 600 601 602 603 604 605 606 607 608 609 60a 60b 60c 60d 60e 60f 660 760 860 960 a60 b60 c60 d60 e60 f60