If you don't take a time to really think about it, you probably just think "oh, what a nice color" when you look at the buildings in Ireland. Or you might not even bother noticing that these buildings are of different colors because you are dying to reach your target destination when you walk in the rain. Or when you're rushing to school.
Why are the buildings colored brightly? It's because everything around those buildings are grey. I'm not sure if these make any differences to colorblind people, but they do make a difference in my mood.
By the way, I didn't photoshop this picture. The surroundings of those buildings are naturally grey.
