-url.html path=_header_background_image_src -%}
              {%- assign _header_background_image_src = __return -%}
              {%- assign _header_background_image = _header_background_image
                | append: 'url(' | append: _header_background_image_src  | append: ')'-%}
            {%- endif -%}

            {%- assign _header_style = 'background-image:' | append: _header_background_image | append: ';' -%}

            {%- if page.article_header.background_color -%}
              {%- assign _he