Hex #667444 or rgb(102,116,68) in RGB space is the tint of lime. It has hue angle of 77.50 degrees, value = 45 and saturation = 41. #667444 can be obtained by mixing 4 colors: 2 drops of red, 4 drops of green, 4 drops of white, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #667444 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #667444 to the mixer and play with it.