Hex #404239 or rgb(64,66,57) in RGB space is the tint of lime. It has hue angle of 73.33 degrees, value = 26 and saturation = 14. #404239 can be obtained by mixing 4 colors: 3 drops of magenta, 1 drop of blue, 4 drops of green, 4 drops of black.
Nearest safe hex - #333333. Below you can see the block with #404239 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404239 to the mixer and play with it.