Hex #66891a or rgb(102,137,26) in RGB space is the tint of lime. It has hue angle of 78.92 degrees, value = 54 and saturation = 81. #66891a can be obtained by mixing 4 colors: 4 drops of yellow, 1 drop of cyan, 1 drop of green, 4 drops of black.
Nearest safe hex - #669933. Below you can see the block with #66891a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66891a to the mixer and play with it.