Hex #508015 or rgb(80,128,21) in RGB space is the tint of olive. It has hue angle of 86.92 degrees, value = 50 and saturation = 84. #508015 can be obtained by mixing 4 colors: 5 drops of yellow, 2 drops of blue, 4 drops of green, 5 drops of black.
Nearest safe hex - #669900. Below you can see the block with #508015 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #508015 to the mixer and play with it.