Hex #5bbb37 or rgb(91,187,55) in RGB space is the tint of grass green. It has hue angle of 103.64 degrees, value = 73 and saturation = 71. #5bbb37 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of cyan, 4 drops of green, 2 drops of black.
Nearest safe hex - #66cc33. Below you can see the block with #5bbb37 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bbb37 to the mixer and play with it.