Hex #aa5555 or rgb(170,85,85) in RGB space is the tint of red. It has hue angle of 0.00 degrees, value = 67 and saturation = 50. #aa5555 can be obtained by mixing 3 colors: 1 drop of red, 1 drop of white, 1 drop of black.
Nearest safe hex - #996666. Below you can see the block with #aa5555 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #aa5555 to the mixer and play with it.