Hex #66914d or rgb(102,145,77) in RGB space is the tint of grass green. It has hue angle of 97.94 degrees, value = 57 and saturation = 47. #66914d can be obtained by mixing 4 colors: 3 drops of red, 2 drops of cyan, 4 drops of green, 1 drop of white.
Nearest safe hex - #669966. Below you can see the block with #66914d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66914d to the mixer and play with it.