Hex #668e33 or rgb(102,142,51) in RGB space is the tint of olive. It has hue angle of 86.37 degrees, value = 56 and saturation = 64. #668e33 can be obtained by mixing 3 colors: 2 drops of yellow, 1 drop of cyan, 2 drops of black.
Nearest safe hex - #669933. Below you can see the block with #668e33 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #668e33 to the mixer and play with it.