Many people such as boys, girls, teens…etc., prefer colorful building because it makes them fresh breathtaking. However it is not easy for building/ constructing, you can see these in this page.
Maintaining a complex and colorful facade is far more difficult and expensive than maintaining one painted with a single color, and most expensive paints with special anti-corrosive or weatherproof properties are only produced in a few common colors.
It is wonderful! Now go to the world with colorful building right now.