Hex #403640 or rgb(64,54,64) in RGB space is the tint of magenta. It has hue angle of 300.00 degrees, value = 25 and saturation = 16. #403640 can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of blue, 2 drops of green, 3 drops of black.
Nearest safe hex - #333333. Below you can see the block with #403640 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #403640 to the mixer and play with it.