Hex #878a69 or rgb(135,138,105) in RGB space is the tint of yellow. It has hue angle of 65.45 degrees, value = 54 and saturation = 24. #878a69 can be obtained by mixing 4 colors: 4 drops of yellow, 5 drops of red, 3 drops of blue, 5 drops of cyan.
Nearest safe hex - #999966. Below you can see the block with #878a69 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #878a69 to the mixer and play with it.