Hex #66851a or rgb(102,133,26) in RGB space is the tint of lime. It has hue angle of 77.38 degrees, value = 52 and saturation = 80. #66851a can be obtained by mixing 4 colors: 3 drops of yellow, 2 drops of green, 1 drop of white, 4 drops of black.
Nearest safe hex - #669933. Below you can see the block with #66851a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66851a to the mixer and play with it.