Hex #665f33 or rgb(102,95,51) in RGB space is the tint of khaki. It has hue angle of 51.76 degrees, value = 40 and saturation = 50. #665f33 can be obtained by mixing 4 colors: 1 drop of yellow, 1 drop of red, 1 drop of cyan, 2 drops of black.
Nearest safe hex - #666633. Below you can see the block with #665f33 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665f33 to the mixer and play with it.