Colorful resume cover? There are many colors on the cover of resumes and many black and white resume templates on the inside pages.

Generally speaking, non-art design positions do not need to use resume cover. Using better resume templates will get twice the result with half the effort. Resume templates are mostly black and white.

To sum up: what I want to say to you is that you don't need to use a resume cover, just use a well-made resume template.