Closest hex to #55aaaa is #5aa

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#
#5aa

55aaaa

55aaaa

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 aa

0aa 1aa 2aa 3aa 4aa 5aa 6aa 7aa 8aa 9aa aa0 aa1 aa2 aa3 aa4 aa5 aa6 aa7 aa8 aa9 aaa aab aac aad aae aaf baa caa daa eaa faa

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