Here's the 6 covers I did for DC Comics' ROSE & THORN miniseries several years ago. All were pen & ink illustrations colored in Photoshop.
I include them as one image because I was trying to be all long-haired & high-falutin' with my design idea: all the covers would use only red and green; a bang-on complimentary color theory.
I got the idea from going to the Norman Rockwell exhibit at the High Museum of Art in Atlanta. A bunch of Rockwell's SATURDAY EVENING POST covers used this amazingly restrictive palette of just red & green.
(and I know the earlier ones that were only printed with red & black inks were just as restrictive, but that is a tale for another time)
So, I tried my best to just use the colors of a red roses on these, with varying degrees of success. But a fun exercise!