Hex #404539 or rgb(64,69,57) in RGB space is the tint of olive. It has hue angle of 85.00 degrees, value = 27 and saturation = 17. #404539 can be obtained by mixing 4 colors: 3 drops of red, 4 drops of blue, 3 drops of green, 2 drops of black.
Nearest safe hex - #333333. Below you can see the block with #404539 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404539 to the mixer and play with it.