Chino’s (pleated BTW) FFS, these are such a huge no no that I’m a flabergasted that someones even mentioned them.
If you have to wear them, make them the no pleat, modern cut straight leg variety and either black/grey/sand in colour never ever go for those pasty beige iron crease debacles.. Lots of Guys wearing modern cut chinos in this Glee Foundation Society of ours and they can look really good. You can wear a Polo shirt too but if it’s got a “polo” badge on it be prepared for uber embarassed giggles as people notice, make the polo shirt a slim cut and stand tall, on no occasion be tempted to tuck it into jeans/chinos or you will look a tosser (sorry, but you will)
Shoes and belt must match in colour, so too a watch strap unless it’s a metal braclett type.
No necklaces please unless it’s got your wedding ring on.
Having said all that you really can’t go wrong with dark skinny jeans and a dark blue or black shirt or polo shirt. You can lighten that up with a pair of light tan loafers (ALDO, no not ALDI, ALDO) do some modern takes on the loafer. If you feel cold put on a very dark suit jacket combine with jeans but this time wear a dark t-shirt, again this must be slim fitting, then add a pair of converse.
Anything with Ralph Lauren on it vom in multicolour, you will look a ****.