Hex #666e22 or rgb(102,110,34) in RGB space is the tint of yellow. It has hue angle of 66.32 degrees, value = 43 and saturation = 69. #666e22 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 2 drops of blue, 4 drops of green.
Nearest safe hex - #666633. Below you can see the block with #666e22 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #666e22 to the mixer and play with it.