Hex #5b813d or rgb(91,129,61) in RGB space is the tint of olive. It has hue angle of 93.53 degrees, value = 51 and saturation = 53. #5b813d can be obtained by mixing 4 colors: 5 drops of yellow, 2 drops of blue, 2 drops of cyan, 5 drops of black.
Nearest safe hex - #669933. Below you can see the block with #5b813d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #5b813d to the mixer and play with it.