Closest hex to #aaaa99 is #aa9

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#
#aa9

aaaa99

aaaa99

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 a9

0a9 1a9 2a9 3a9 4a9 5a9 6a9 7a9 8a9 9a9 a90 a91 a92 a93 a94 a95 a96 a97 a98 a99 a9a a9b a9c a9d a9e a9f aa9 ba9 ca9 da9 ea9 fa9

contains a9

0a9 1a9 2a9 3a9 4a9 5a9 6a9 7a9 8a9 9a9 a90 a91 a92 a93 a94 a95 a96 a97 a98 a99 a9a a9b a9c a9d a9e a9f aa9 ba9 ca9 da9 ea9 fa9