Hex #5b7b5b or rgb(91,123,91) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 48 and saturation = 26. #5b7b5b can be obtained by mixing 4 colors: 5 drops of red, 5 drops of cyan, 3 drops of green, 1 drop of black.
Nearest safe hex - #666666. Below you can see the block with #5b7b5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b7b5b to the mixer and play with it.