Hex #508d5a or rgb(80,141,90) in RGB space is the tint of bluish green. It has hue angle of 129.84 degrees, value = 55 and saturation = 43. #508d5a can be obtained by mixing 4 colors: 1 drop of blue, 5 drops of green, 5 drops of white, 5 drops of black.
Nearest safe hex - #669966. Below you can see the block with #508d5a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #508d5a to the mixer and play with it.