Hex #555215 or rgb(85,82,21) in RGB space is the tint of yellow. It has hue angle of 57.19 degrees, value = 33 and saturation = 75. #555215 can be obtained by mixing 4 colors: 3 drops of red, 4 drops of green, 1 drop of white, 4 drops of black.
Nearest safe hex - #666600. Below you can see the block with #555215 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #555215 to the mixer and play with it.