Hex #783f5b or rgb(120,63,91) in RGB space is the tint of scarlet. It has hue angle of 330.53 degrees, value = 47 and saturation = 48. #783f5b can be obtained by mixing 4 colors: 4 drops of red, 4 drops of magenta, 5 drops of blue, 4 drops of green.
Nearest safe hex - #663366. Below you can see the block with #783f5b color and its structure: in procentage ratio and in drops of pigments. Click "TRY" button to move #783f5b to the mixer and play with it.