A post has an article header overlay with a background image.
front matter:
---
layout: article
title: Page - Article Header Overlay Background Image
article_header:
type: overlay
theme: dark
background_color: '#203028'
background_image:
gradient: 'linear-gradient(135deg, rgba(34, 139, 87 , .4), rgba(139, 34, 139, .4))'
src: /docs/assets/images/cover3.jpg
---