Hex #669444 or rgb(102,148,68) in RGB space is the tint of olive. It has hue angle of 94.50 degrees, value = 58 and saturation = 54. #669444 can be obtained by mixing 4 colors: 2 drops of yellow, 4 drops of green, 4 drops of white, 5 drops of black.
Nearest safe hex - #669933. Below you can see the block with #669444 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669444 to the mixer and play with it.