Hex #669c22 or rgb(102,156,34) in RGB space is the tint of olive. It has hue angle of 86.56 degrees, value = 61 and saturation = 78. #669c22 can be obtained by mixing 3 colors: 1 drop of yellow, 1 drop of magenta, 3 drops of green.
Nearest safe hex - #669933. Below you can see the block with #669c22 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669c22 to the mixer and play with it.