Acceptable Fall Wedding Colors

Ok...so, I am also planning to have a fall wedding and I wanted to know if a light shade of blue is acceptable, I want silver as my other color and I was planning to do a fairytale theme...but I really need to know if this color would be appropriate and if I will be able to find it in the fall. If you happen to come across a lighter shade of blue that is accpetable for fall, please email me, I`d greatly appreciate it!
Cmlipscomb88@yahoo.com