Hex #664555 or rgb(102,69,85) in RGB space is the tint of scarlet. It has hue angle of 330.91 degrees, value = 40 and saturation = 32. #664555 can be obtained by mixing 4 colors: 2 drops of magenta, 1 drop of green, 2 drops of white, 5 drops of black.
Nearest safe hex - #663366. Below you can see the block with #664555 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #664555 to the mixer and play with it.