Hex #665f2b or rgb(102,95,43) in RGB space is the tint of yellow. It has hue angle of 52.88 degrees, value = 40 and saturation = 58. #665f2b can be obtained by mixing 4 colors: 3 drops of yellow, 1 drop of magenta, 1 drop of cyan, 5 drops of black.
Nearest safe hex - #666633. Below you can see the block with #665f2b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #665f2b to the mixer and play with it.