Hex #404d2b or rgb(64,77,43) in RGB space is the tint of olive. It has hue angle of 82.94 degrees, value = 30 and saturation = 44. #404d2b can be obtained by mixing 3 colors: 1 drop of yellow, 1 drop of blue, 2 drops of black.
Nearest safe hex - #336633. Below you can see the block with #404d2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404d2b to the mixer and play with it.