Business Wear

>>10838418
OP here, also thinking maybe a small checkered print? Colours?

>>10838418
Avoid a plain white shirt with black pants, unless you're also wearing a tie to add some colour. (Not a black tie, obviously.)
Otherwise, white and light blue shirts are the basics you can wear with pretty much anything. If you wear ties, as a general rule go for a plain tie with a striped shirt or a striped tie with a plain shirt. But also just look at yourself in a mirror and see if it looks good. If it does, you're fine.
Check pattern shirts can look a bit less formal, which may or may not be what you're looking for.