Closest hex to #ffef3c is #fe4

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#fe4

ffef3c

ffef3c

contains fe

0fe 1fe 2fe 3fe 4fe 5fe 6fe 7fe 8fe 9fe afe bfe cfe dfe efe fe0 fe1 fe2 fe3 fe4 fe5 fe6 fe7 fe8 fe9 fea feb fec fed fee fef ffe

contains e4

0e4 1e4 2e4 3e4 4e4 5e4 6e4 7e4 8e4 9e4 ae4 be4 ce4 de4 e40 e41 e42 e43 e44 e45 e46 e47 e48 e49 e4a e4b e4c e4d e4e e4f ee4 fe4

contains f4

0f4 1f4 2f4 3f4 4f4 5f4 6f4 7f4 8f4 9f4 af4 bf4 cf4 df4 ef4 f40 f41 f42 f43 f44 f45 f46 f47 f48 f49 f4a f4b f4c f4d f4e f4f ff4