Hex #666233 or rgb(102,98,51) in RGB space is the tint of yellow. It has hue angle of 55.29 degrees, value = 40 and saturation = 50. #666233 can be obtained by mixing 3 colors: 1 drop of yellow, 1 drop of white, 3 drops of black.
Nearest safe hex - #666633. Below you can see the block with #666233 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666233 to the mixer and play with it.