Purple, yellow and blue are preferred because the background colors for each part of textual content which can make it get noticed from the black background. The phoneticization in the book’s title is represented around the cover in substantial, blue text. In between this, the title is prepared as normal. https://bookillustrationservices.video.blog/2025/08/13/best-self-publishing-companies-uk-maple-publishers-author-focused-approach/