Hex #405b00 or rgb(64,91,0) in RGB space is the tint of lime. It has hue angle of 77.80 degrees, value = 36 and saturation = 100. #405b00 can be obtained by mixing 3 colors: 1 drop of red, 2 drops of green, 1 drop of black.
Nearest safe hex - #336600. Below you can see the block with #405b00 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #405b00 to the mixer and play with it.