Closest hex to #ccff66 is #cf6

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#cf6

ccff66

ccff66

contains cf

0cf 1cf 2cf 3cf 4cf 5cf 6cf 7cf 8cf 9cf acf bcf ccf cf0 cf1 cf2 cf3 cf4 cf5 cf6 cf7 cf8 cf9 cfa cfb cfc cfd cfe cff dcf ecf fcf

contains f6

0f6 1f6 2f6 3f6 4f6 5f6 6f6 7f6 8f6 9f6 af6 bf6 cf6 df6 ef6 f60 f61 f62 f63 f64 f65 f66 f67 f68 f69 f6a f6b f6c f6d f6e f6f ff6

contains c6

0c6 1c6 2c6 3c6 4c6 5c6 6c6 7c6 8c6 9c6 ac6 bc6 c60 c61 c62 c63 c64 c65 c66 c67 c68 c69 c6a c6b c6c c6d c6e c6f cc6 dc6 ec6 fc6