Hex #667739 or rgb(102,119,57) in RGB space is the tint of lime. It has hue angle of 76.45 degrees, value = 47 and saturation = 52. #667739 can be obtained by mixing 4 colors: 3 drops of yellow, 3 drops of red, 5 drops of blue, 4 drops of green.
Nearest safe hex - #666633. Below you can see the block with #667739 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667739 to the mixer and play with it.