Your blog design is one of important thing that must be considered to make your blog professional, interesting, and liked by your blog visitors. The blog visitors will be pleasant visiting your blog. Not only that, if you exact choose your blog template, the search engine will be easy to index your blog. So, it is one of SEO tips for blog too.
If you need to ask, you can ask your question on the comment box. Hopefully useful for you and happy blogging 🙂