Hex #668a4d or rgb(102,138,77) in RGB space is the tint of olive. It has hue angle of 95.41 degrees, value = 54 and saturation = 44. #668a4d can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of magenta, 1 drop of cyan, 5 drops of green.
Nearest safe hex - #669966. Below you can see the block with #668a4d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668a4d to the mixer and play with it.