White text showing darker when site is opening

Hi All

I have just completed my site and was about to launch when I have noticed that some of my text is darker and hard to read. It wasn’t like this when I built the specific page, so not sure if a global setting may of affected it? But the rest of the site is absolutely fine. It doesn’t matter what colour I change it to, it’s just coming through as a darker version of my selection making it impossible to read. ?

Any help would be highly appreciated!

How is looks in the editor:

How is looks on the site: