If someone is in a position where they have to read through 100 resumes, there is a limit to how often they can look at a paragraph-formatted WYSIWYG text edited black and white document that says "I did well at school, I worked some jobs afterwards, now I want to work here". They blend together something shocking.

It is worth having a tasteful dash of colour or maybe a formatted header/footer where possible. Low bar, but there is a big pool of serially unable-to-get-past-screening candidates who can't clear it and you want to stand out from them if at all possible.