Hex #404b1d or rgb(64,75,29) in RGB space is the tint of lime. It has hue angle of 74.35 degrees, value = 29 and saturation = 61. #404b1d can be obtained by mixing 4 colors: 1 drop of red, 2 drops of magenta, 5 drops of green, 4 drops of black.
Nearest safe hex - #333333. Below you can see the block with #404b1d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #404b1d to the mixer and play with it.