Hex #999e91 or rgb(153,158,145) in RGB space is the tint of olive. It has hue angle of 83.08 degrees, value = 62 and saturation = 8. #999e91 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of blue, 5 drops of white, 3 drops of black.
Nearest safe hex - #999999. Below you can see the block with #999e91 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #999e91 to the mixer and play with it.