This is a classic. The proposal of the sailor suit is perfect if you know in a casual wear or a more chic. You see, the stripes are part of a detail that helps to complete the entire outfit, but measuring its proportion to the colors red and blue are cute.
However, if you are looking for a more youthful look can change its color palette are obtaining results such as this. Always work accompany with some solid tone stripes, like the deep pink. With jeans, a proposal would be super casual, but with a skirt and heels, can go to major events.
And here is an example of a more youthful look that complements our garment striped with some jeggins intense color. I would recommend you try the tops are loose and not tight, so that the shape of the stripes is not distorted.