Hex #663c5e or rgb(102,60,94) in RGB space is the tint of crimson. It has hue angle of 311.43 degrees, value = 40 and saturation = 41. #663c5e can be obtained by mixing 4 colors: 4 drops of magenta, 1 drop of cyan, 2 drops of green, 3 drops of black.
Nearest safe hex - #663366. Below you can see the block with #663c5e color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #663c5e to the mixer and play with it.