I've seen Blue Period, you mean the change in color and character expressions? Yeah, but it kinda got rushed tho, I'd been a fan for years and was waiting for the anime.
If you want more examples check out Shaft's works like March Comes In Like A Lion and Monogatari and Call Of The Night (it's not by the shaft studio but its a shaft director)
also I liked the depiction you did with a color swap. How about this
panel one: she was there, but she wasn't (colorless girl with colorless desk looking around)
panel two: until she no longer was (complete reversal, colorful desk and colorless environment and a colorless rose on her desk, also the girl disappears)
second panel would show that her presence was only known when she committed suicide and before that nobody knew of her so she was the colorless part, and after she died, it changed, now she was the center of attention and everyone focused on the news and everywhere but her desk lost color, and there's even a colorless flower there that shows someone from the outside put it there, but it doesn't become colorful, it's in contrast with the colorless environment its in, because it's too late to put a flower there and change the color
ahhh sorry this got long
anyway, yeah
best art is made when the artist and the writer both know what they're doing
the artist should know what the author has in mind
and the author should know that the artist can turn the idea and concept the author has inside their dumb head into something with a lot of layers