Color — the decisive filter almost nobody applies
It's the most powerful of the four and the least used. The same white shirt makes one person look rested and another look ill, and it isn't the shirt that changed: it's the relationship between the tone of the fabric and the undertone of your skin. That is what personal color analysis measures, with no mysticism involved — whether your skin leans warm or cool, how much contrast sits between your skin, your hair and your eyes, and which colors work in favor of that. Get color right and you need half the garments, because everything that's left goes with everything else. A navy that suits you does more for a photograph than a label that doesn't.