Hex #55a61d or rgb(85,166,29) in RGB space is the tint of olive. It has hue angle of 95.47 degrees, value = 65 and saturation = 83. #55a61d can be obtained by mixing 4 colors: 4 drops of yellow, 2 drops of blue, 5 drops of green, 1 drop of black.
Nearest safe hex - #669933. Below you can see the block with #55a61d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #55a61d to the mixer and play with it.