Hex #668a1a or rgb(102,138,26) in RGB space is the tint of lime. It has hue angle of 79.29 degrees, value = 54 and saturation = 81. #668a1a can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 1 drop of cyan, 5 drops of green.
Nearest safe hex - #669933. Below you can see the block with #668a1a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668a1a to the mixer and play with it.