OUDG404- What is a book? colour

from looking at books in shops and online and also looking at posters i found that using as less colours as i could would make the book look clear but also make it look modern and stand out from other books. from some book layouts i found i really liked the mix of white and blue papers and having black and white text it meant having black type on white paper it would be clear and easy read also with the blue and having white type on it. the blue is really bold and eye catching perfect at standing out from other books.