"That other animals have more cone cells than humans, e.g. birds with four and shrimp with up to 16, and so probably see colors we can’t even conceive of which, yeah, that limitation of our minds is frustrating, but it also hints that there are huge unseen dark continents of qualia lurking out there which someday we might find a way to visit."
This is based on a misunderstanding regarding the rise of qualia. It is processing power and not sensor capacity or at least both together in some combination with processing power doing the heavy lift. Humans have less cones but several OOM more neurons to make sense of what we have. So no - the shrimp doesn't see in spectacular color.
Experimentally proved:
https://www.jhunewsletter.com/article/2015/12/mantis-shrimp-...