Hex #663656 or rgb(102,54,86) in RGB space is the tint of crimson. It has hue angle of 320.00 degrees, value = 40 and saturation = 47. #663656 can be obtained by mixing 3 colors: 4 drops of red, 5 drops of blue, 1 drop of green.
Nearest safe hex - #663366. Below you can see the block with #663656 color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663656 to the mixer and play with it.