Color pictures in full-view books in Google Books are generally not common. This is not surprising, since color pictures in books generally before the pre-copyright date (1923) were uncommon. Searches in Google Books for likely subjects — museum, sculpture, french painting, history – do find many books with pictures, but they are almost all black and white.
An exception to the general lack of colored illustrations in older books is in the areas of botany and dermatology, two subjects in which I have a particular interest. In these subjects there were many books published in the 19th century, especially in Europe, with excellent color illustrations. A few examples from Google Books About This Book: Selected Pages are shown here.
For more see Color Pictures in Google Books: More examples