Hex #666222 or rgb(102,98,34) in RGB space is the tint of yellow. It has hue angle of 56.47 degrees, value = 40 and saturation = 67. #666222 can be obtained by mixing 4 colors: 3 drops of red, 1 drop of magenta, 1 drop of blue, 5 drops of green.
Nearest safe hex - #666633. Below you can see the block with #666222 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666222 to the mixer and play with it.