The generic uniform of employees at places like Best Buy and Target? Many retail workplaces have chosen khakis and a solid color polo as their uniform. If you wear that outfit with a red shirt and go to shop at Target, people are going to accost you with questions. I did that to a poor Sports Authority guy who had just gotten off work and was buying shampoo at Target. So I'd only dress this way if I were on the clock in retail.
The pants choice would probably work for business casual, but I would pair it with a nice shirt (read: not jersey material if it's made from cotton) and a cardigan or blazer. Or a nice button-down shirt and maybe a sweater or sweater vest. You can skip the outer layers if you are somewhere warm like Florida, but I'd then still wear layers, just in floaty breezy fabrics.
Here is an image that may help you:
...or you can click through the links in my previous post, which are quite helpful.
When in doubt, I always dress a little dressier than I think is called for in the situation. Better to be overdressed than underdressed, right?
🙂