Cerise, on the other hand, has to be added. Or, given the surprising number of deep red colors beginning with 'c', change the question.
I tried cortex, cranium, cerebellum, (and yes, first cognitive though had no hopes for that, was just warming up by association) might ve tried cerebral aswell.
cirrus was annoying though, spent ages trying to write cumulo nimbus or whatever it is haha. Never remember it exactly. (Wow, looked it up now and the one I chose to write here was right!! I must ve tried 30 variations haha cumilus.. only part I knew was correct was nimbus