Hex #66884d or rgb(102,136,77) in RGB space is the tint of olive. It has hue angle of 94.58 degrees, value = 53 and saturation = 43. #66884d can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of green, 3 drops of white, 4 drops of black.
Nearest safe hex - #669966. Below you can see the block with #66884d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66884d to the mixer and play with it.