Hex #71d639 or rgb(113,214,57) in RGB space is the tint of grass green. It has hue angle of 98.60 degrees, value = 84 and saturation = 73. #71d639 can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of cyan, 4 drops of green, 1 drop of white.
Nearest safe hex - #66cc33. Below you can see the block with #71d639 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #71d639 to the mixer and play with it.