Hex #407800 or rgb(64,120,0) in RGB space is the tint of olive. It has hue angle of 88.00 degrees, value = 47 and saturation = 100. #407800 can be obtained by mixing 3 colors: 3 drops of yellow, 4 drops of green, 5 drops of black.
Nearest safe hex - #336600. Below you can see the block with #407800 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #407800 to the mixer and play with it.