Hex #66971a or rgb(102,151,26) in RGB space is the tint of olive. It has hue angle of 83.52 degrees, value = 59 and saturation = 83. #66971a can be obtained by mixing 4 colors: 3 drops of yellow, 3 drops of green, 1 drop of white, 3 drops of black.
Nearest safe hex - #669933. Below you can see the block with #66971a color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66971a to the mixer and play with it.