Hex #666239 or rgb(102,98,57) in RGB space is the tint of yellow. It has hue angle of 54.67 degrees, value = 40 and saturation = 44. #666239 can be obtained by mixing 4 colors: 5 drops of yellow, 1 drop of magenta, 4 drops of blue, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #666239 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666239 to the mixer and play with it.