Issue title: Font/Background Color in Code Blocks
 Issue body: Is there a way to change these? When I paste a simple text, it is too unreadable IMO and I'd like the text to be white if possible.
 Comments: 
 Comment 0: the styling for the code blocks is in `_sass/uno.scss` around line 1020
`code {
	padding: .1em .4em;
	background: #e8f2fb;
	border: 1px solid #c9e1f6;
	border-radius: 3px;
	font-family: Consolas, Menlo, Monaco, Lucida Console, Liberation Mono, DejaVu Sans Mono, Bitstream Vera Sans Mono, Courier New, monospace, serif;
	font-size: .85em; }`
{'source': 'GithubIssues', 'repo_name_with_owner': 'joshgerdes/jekyll-uno', 'issue_id': 453568318, 'repo_stars': 743.0}