Bring home funky Halloween costumes for boys and toddlers and save up to 50% on your purchase made via TopOfStyle. Irrespective of what sort of costume you’re looking for, your search will end at Fun Costumes. The brand offers an enormous range of popular-themed costumes in various sizes. Navy blue is the most common color for denim and dress pants. Don’t go just plain. Choose from Solid and Printed types of Fun Costumes Navy Blue Other Clothing for boys.