Hex #99644d or rgb(153,100,77) in RGB space is the tint of orange red. It has hue angle of 18.16 degrees, value = 60 and saturation = 50. #99644d can be obtained by mixing 4 colors: 1 drop of yellow, 2 drops of red, 3 drops of white, 4 drops of black.
Nearest safe hex - #996666. Below you can see the block with #99644d color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #99644d to the mixer and play with it.