I knew It1 I’ll recognize those vases anywhere. :)
That’s a shame though, I kinda loved those Queen prints, but I dig pop art. I hope you can find a different place for them. Do you remember where your friend got them?
It also helps if the light values are similar; nothing too dark next to something very light. The colors themselves should be minimal. That way, they do not over power the simplicity of the greyscale.