Are the umbrellas an allegory of their characters in their budding relationship? Pitch bla...

Are the umbrellas an allegory of their characters in their budding relationship? Pitch black, couldn't see the seme's eyes (the ones that better express your intentions and therefore reveal yourself), so mysterious. And then uke's umbrella is literally transparent, you can see everything he's feeling and the way he reasons.
It could be the way the seme sees him, since all the other characters in the story seem to find it hard to wrap their heads around the uke, while he seems to understand more about him than the uke himself (with also the suspect that he might actually be an omega and not a beta). While it seems like all the other characters really know the seme and understand all the little facets of his personality.
Also, as readers, we know a lot about the uke's backstory and what he feels for the seme and the way he sees the world. While we have very limited information regarding the seme. We've just come to know his origins and ethnicities, and the way he acts towards uke is so unexpected at times.
With this being a story revolved around art, I wouldn't be surprised if this detail was intentional and not just unconsciously inserted.