All the templates offered by Yola have a default background colour or pattern and a default text colour. There are also default font types, styles and sizes for the various 'h' tags and the 'body' itself.
Using the default colour for text produces that colour text on screen but a black text on a white background in the feed. Something that's most important for readability. If you change the background colour or pattern the RSS feed background remains white. Once again a convenient aspect. If ... Continue reading ...