Your background is controlled by the CSS and, it appears that you've dropped the call for the child. Sometimes called odd - even, sometimes parent - child.

Moreover, I'm concerned about your color choices. Check out https://contrast-ratio.com/#black-on-blue to see what your text looks like on the blue. Then click the swap colors button. Note that both options are less than 3 on the contrast scale. Change the black to white and note the difference.

Blue is a well-liked color by both male and female, but they both need to be able to read the text.

This is one of the major hits (along with font size) for mobiles and tablets.

Finally, what is your Product status in Catalog in the admin >> Configuration >> Stock, sixth item down.