I personally think that the light blue oxford cloth button down (OCBD) shirt is one of the most versatile pieces you can own. Just to demonstrate, I've outfitted my personal Brooks Brothers OCDB in two ways. One being more formal, the other being more casual. Check it out. First, a casual OCBD look. I paired my shirt with a pair of shorts and sneakers to keep cool during the summer months.
Remember that you don't want your shorts to be any longer than seen above. Keeping it right at/above the knee is a great length in my opinion.
I love a classic white sneaker. So easy to wear.
Roll the sleeves up and wear the shirt like a short sleeved dress shirt.
Watch: Timex | Belt: Uniqlo
And now for the more formal look. I wore this outfit to a client dinner the other day actually. Personally thought it worked quite well.
The grey trousers / navy jacket look is actually one of my favorites.
Colorful socks per usual.
Can't forget your accessories (belt/watch).
I encourage you all to get yourself an oxford cloth button down shirt, especially in the color light blue. Dress it up, dress it down, dress it all around. It'll work with more combinations of outfits than you can possibly imagine.