Hex #66135b or rgb(102,19,91) in RGB space is the tint of crimson. It has hue angle of 307.95 degrees, value = 40 and saturation = 81. #66135b can be obtained by mixing 4 colors: 2 drops of red, 4 drops of magenta, 4 drops of blue, 5 drops of black.
Nearest safe hex - #660066. Below you can see the block with #66135b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #66135b to the mixer and play with it.