I actually find ties in colors like this (light) somewhat difficult to wear. That's not to say impossible, just they tend to look washed out with a light shirt and dark jacket, and even worse with a dark shirt. I could see them looking good with a khaki or seersucker suit, but I own neither.
Plus, wouldn't non-matching but coordinating pocket squares be better than a matching set?
You would have to wear them with a summer suit, though some (I was thinking the yellow and red) might work with a light grey or a navy.
As for the pocket squares. I wouldn't match. I would either wear the tie and a white pocket square, or the pocket square and a different tie.