Closest hex to #55aa00 is #5a0

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#
#5a0

55aa00

55aa00

contains 5a

05a 15a 25a 35a 45a 55a 5a0 5a1 5a2 5a3 5a4 5a5 5a6 5a7 5a8 5a9 5aa 5ab 5ac 5ad 5ae 5af 65a 75a 85a 95a a5a b5a c5a d5a e5a f5a

contains a0

0a0 1a0 2a0 3a0 4a0 5a0 6a0 7a0 8a0 9a0 a00 a01 a02 a03 a04 a05 a06 a07 a08 a09 a0a a0b a0c a0d a0e a0f aa0 ba0 ca0 da0 ea0 fa0

contains 50

050 150 250 350 450 500 501 502 503 504 505 506 507 508 509 50a 50b 50c 50d 50e 50f 550 650 750 850 950 a50 b50 c50 d50 e50 f50