Hex #665f4d or rgb(102,95,77) in RGB space is the tint of khaki. It has hue angle of 43.20 degrees, value = 40 and saturation = 25. #665f4d can be obtained by mixing 4 colors: 1 drop of red, 1 drop of green, 3 drops of white, 5 drops of black.
Nearest safe hex - #666666. Below you can see the block with #665f4d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665f4d to the mixer and play with it.