Reading Anne of Avonlea, I see the main characters encounter a problem when by accident the hall that they cared about so much was painted blue instead of green:
"Haven't you heard?" said Jane wrathfully. "Well, its simply this. . .Joshua Pye has gone and painted the hall blue instead of green. . .a deep, brilliant blue, the shade they use for painting carts and wheelbarrows. And Mrs. Lynde says it is the most hideous color for a building, especially when combined with a red roof, that she ever saw or imagined. You could simply have knocked me down with a feather when I heard it. It's heartbreaking, after all the trouble we've had."
While this paragraph mentions that "blue" was "the shade they use for painting carts and wheelbarrows", it's not obvious to me why that is a problem. Do I miss some important context which is obvious to Canadian readers? Why is green a better choice here "especially when combined with a red roof", and why is blue with a red roof so "hideous"?