Closest hex to #45d2fa is #4cf

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#
#4cf

45d2fa

45d2fa

contains 4c

04c 14c 24c 34c 44c 4c0 4c1 4c2 4c3 4c4 4c5 4c6 4c7 4c8 4c9 4ca 4cb 4cc 4cd 4ce 4cf 54c 64c 74c 84c 94c a4c b4c c4c d4c e4c f4c

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 4f

04f 14f 24f 34f 44f 4f0 4f1 4f2 4f3 4f4 4f5 4f6 4f7 4f8 4f9 4fa 4fb 4fc 4fd 4fe 4ff 54f 64f 74f 84f 94f a4f b4f c4f d4f e4f f4f