There's balance shown in this outfit between the simple white tank top and the layered full skirt. The common white background allows them to match while the pattern and texture of the skirt makes it focal piece of the outfit.
Modest Fashion doesn't mean frumpy! Fashion Tips (and a free eBook) here: Do your clothing choices, manners, and poise portray the image you want to send? "Dress how you wish to be dealt with!" (E. Jean)