Hex #999e55 or rgb(153,158,85) in RGB space is the tint of yellow. It has hue angle of 64.11 degrees, value = 62 and saturation = 46. #999e55 can be obtained by mixing 4 colors: 5 drops of yellow, 4 drops of red, 5 drops of cyan, 1 drop of black.
Nearest safe hex - #999966. Below you can see the block with #999e55 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #999e55 to the mixer and play with it.