matching outfits

Natasha frequently criticizes the clothes I pick out for Evangeline to wear. She seems to feel that I have no skill at matching sets of clothes. My common defenses:

• But they're *almost* the same shade.
• But the dress and the shirt both have flowers on them!
  
• But you complained when they were almost the same. Why is it wrong that they're completely different?

I'm afraid I just don't get it. The most complicated rule I have been able to master is "Jeans go with everything."