Hex #55ae40 or rgb(85,174,64) in RGB space is the tint of grass green. It has hue angle of 108.55 degrees, value = 68 and saturation = 63. #55ae40 can be obtained by mixing 4 colors: 2 drops of yellow, 2 drops of red, 3 drops of cyan, 5 drops of green.
Nearest safe hex - #669933. Below you can see the block with #55ae40 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55ae40 to the mixer and play with it.