Closest hex to #ddff00 is #df0

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#df0

ddff00

ddff00

contains df

0df 1df 2df 3df 4df 5df 6df 7df 8df 9df adf bdf cdf ddf df0 df1 df2 df3 df4 df5 df6 df7 df8 df9 dfa dfb dfc dfd dfe dff edf fdf

contains f0

0f0 1f0 2f0 3f0 4f0 5f0 6f0 7f0 8f0 9f0 af0 bf0 cf0 df0 ef0 f00 f01 f02 f03 f04 f05 f06 f07 f08 f09 f0a f0b f0c f0d f0e f0f ff0

contains d0

0d0 1d0 2d0 3d0 4d0 5d0 6d0 7d0 8d0 9d0 ad0 bd0 cd0 d00 d01 d02 d03 d04 d05 d06 d07 d08 d09 d0a d0b d0c d0d d0e d0f dd0 ed0 fd0