Hex #6d9900 or rgb(109,153,0) in RGB space is the tint of lime. It has hue angle of 77.25 degrees, value = 60 and saturation = 100. #6d9900 can be obtained by mixing 3 colors: 3 drops of yellow, 2 drops of green, 2 drops of black.
Nearest safe hex - #669900. Below you can see the block with #6d9900 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #6d9900 to the mixer and play with it.