Hex #5bb537 or rgb(91,181,55) in RGB space is the tint of grass green. It has hue angle of 102.86 degrees, value = 71 and saturation = 70. #5bb537 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of blue, 1 drop of cyan, 5 drops of green.
Nearest safe hex - #66cc33. Below you can see the block with #5bb537 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5bb537 to the mixer and play with it.