Thanks for reaching out, Mazz26.
It sounds like you're finding the color scheme of certain websites to be hard to read. We can help.
While the design of websites is ultimately up to the owner, there are some options you can use to make it easier to view.
Check out Use display and text size preferences on your iPhone, iPad, and iPod touch to turn on Invert Colors:
If you benefit from viewing items against a dark background, you can use Invert Colors to change how content is displayed on your screen.
To use Invert Colors, open the Settings app, then tap Accessibility > Display & Text Size. Turn on Smart Invert or Classic Invert.
Hope that helps.
Take care.