Hi,
If you have used external css then check the link of that css file and then verify the selectors which are used in that css file.
Use the Background property, background-color:"color-name";
May be this work for you.

Thank you,
Harit

We are trying to change the CSS file that is used by a template. We have updated the CSS file. We have seen the new CSS file is in SAP because we can modify it, and the web has modified the path to the new CSS.

Cascading Style Sheets (more commonly known as CSS, or stylesheets) is a file that tells our browsers how the website should look like.Contained within CSS files are code contents that tell your browser how to render(in other words, show) the webpage.