Hex #663b56 or rgb(102,59,86) in RGB space is the tint of crimson. It has hue angle of 322.33 degrees, value = 40 and saturation = 42. #663b56 can be obtained by mixing 4 colors: 1 drop of yellow, 3 drops of red, 5 drops of blue, 1 drop of black.
Nearest safe hex - #663366. Below you can see the block with #663b56 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663b56 to the mixer and play with it.