Hex #5b803d or rgb(91,128,61) in RGB space is the tint of olive. It has hue angle of 93.13 degrees, value = 50 and saturation = 52. #5b803d can be obtained by mixing 4 colors: 3 drops of yellow, 2 drops of red, 5 drops of blue, 4 drops of green.
Nearest safe hex - #669933. Below you can see the block with #5b803d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b803d to the mixer and play with it.