Hex #aa8139 or rgb(170,129,57) in RGB space is the tint of khaki. It has hue angle of 38.23 degrees, value = 67 and saturation = 66. #aa8139 can be obtained by mixing 3 colors: 4 drops of yellow, 2 drops of red, 3 drops of blue.
Nearest safe hex - #999933. Below you can see the block with #aa8139 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #aa8139 to the mixer and play with it.