Closest hex to #C3FF21 is #bf2

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#bf2

C3FF21

C3FF21

contains bf

0bf 1bf 2bf 3bf 4bf 5bf 6bf 7bf 8bf 9bf abf bbf bf0 bf1 bf2 bf3 bf4 bf5 bf6 bf7 bf8 bf9 bfa bfb bfc bfd bfe bff cbf dbf ebf fbf

contains f2

0f2 1f2 2f2 3f2 4f2 5f2 6f2 7f2 8f2 9f2 af2 bf2 cf2 df2 ef2 f20 f21 f22 f23 f24 f25 f26 f27 f28 f29 f2a f2b f2c f2d f2e f2f ff2

contains b2

0b2 1b2 2b2 3b2 4b2 5b2 6b2 7b2 8b2 9b2 ab2 b20 b21 b22 b23 b24 b25 b26 b27 b28 b29 b2a b2b b2c b2d b2e b2f bb2 cb2 db2 eb2 fb2