Hex #888b00 or rgb(136,139,0) in RGB space is the tint of yellow. It has hue angle of 61.29 degrees, value = 55 and saturation = 100. #888b00 can be obtained by mixing 4 colors: 5 drops of yellow, 3 drops of red, 5 drops of green, 2 drops of black.
Nearest safe hex - #999900. Below you can see the block with #888b00 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #888b00 to the mixer and play with it.