My tip would be subtle colour shirts, with colourful, yet understated ties which compliment the shirt, without looking too gauche.
For some guidance, look to TM Lewin, Charles Tyrwhitt and Roderick Charles. Their sites will all have good images as inspiration.
Tie tips;
Avoid faux-club ties. If you have a club, wear the tie, if not don’t pretend.
Silk is essential, never polyester. Woven silk is the way ahead.
Knot should be smallish, never a kevballer sized huge knot
Avoid trying to be “funny” with a tie. No one wants to look like Colin Hunt.
Some key shirt tips as well;
Double cuff only
No pockets
No button downs with a tie. Maybe OK on a Friday, but otherwise no
No short sleeves, don’t want to look like a bus driver, do you?