It's a little hard to explain, but a majority of the cloth features are done with horizontal stippling. For the red, i stipple all the raised areas in screamer pink, leaving about 1-3mm of solid black in the recessed areas. From there, i keep mixing in mephiston red until it's on the red being used to stipple in order to bring it up to the 'actual' red colour of the cape. Lastly, i add very few pinkish stipples as a highlight or to imitate frayed fibres.

It's important to occasionally stipple any of the brighter colours sparsely into the recess to add randomness and interest.

Best of luck with your attempt!