There are some setting.
Go to Settings < ease of access < High contrast ON
With this basically you do not have colors anymore (a single tile still has it) but everything becomes Black and White.
Go to Settings < ease of access < Screen Magnifier ON
With this you can enlarge "everything" but sometimes people enable this by accident and do not know how to "go back"
I hope this helps.And check out Narrator
Use Narrator on my phone - Microsoft - Global
But also Narrator is a tricky one if you do not know how to switch it off.