Hex #5b975b or rgb(91,151,91) in RGB space is the tint of green. It has hue angle of 120.00 degrees, value = 59 and saturation = 40. #5b975b can be obtained by mixing 4 colors: 4 drops of red, 4 drops of cyan, 5 drops of green, 1 drop of white.
Nearest safe hex - #669966. Below you can see the block with #5b975b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b975b to the mixer and play with it.