Hex #99c777 or rgb(153,199,119) in RGB space is the tint of olive. It has hue angle of 94.50 degrees, value = 78 and saturation = 40. #99c777 can be obtained by mixing 4 colors: 4 drops of yellow, 3 drops of blue, 3 drops of green, 5 drops of white.
Nearest safe hex - #99cc66. Below you can see the block with #99c777 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99c777 to the mixer and play with it.