I and my classmates found somewhat easy to do architectural designs but when it comes to color we have always done the worst. Could you please suggest the best book you ever seen on how to color your buildings? Thanx.
Color in Architecture by Harold Linton is good for both examples and some theory for architectural applications, link below:
You might also just read some generic color theory. Color is color, regardless of what you put it on. One that I might recommend is Color Choices by Stephen Quiller. It's a good for a simple overview of practical color theory applications.