Hex #669c11 or rgb(102,156,17) in RGB space is the tint of olive. It has hue angle of 83.31 degrees, value = 61 and saturation = 89. #669c11 can be obtained by mixing 4 colors: 4 drops of yellow, 1 drop of blue, 3 drops of green, 2 drops of black.
Nearest safe hex - #669900. Below you can see the block with #669c11 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #669c11 to the mixer and play with it.