When changing the colour of text or paragraph rules in my document, the colours are not changing on the page - they are still showing as white, even though both rules and titles have been changed to orange.

If I drag the text block off the page to the bleed/slug area, the correct colour change can be seen. When I export the pages to PDF the colour is also showing up correctly, yet I can’t see them when working in the document. See screen shot below.