Here's just one way you can use it to coordinate an outfit:
- Snap a picture of your favorite shirt
- Tap on the dominant color of the shirt
- Now, slide the sliders until you like the colors you see.
If you want to match a pair of pants, for example, use a similar color - so you want similar colors for the larger pieces of clothing (shirt & pants in this example).
Want to match a tie, just pick a contrasting color. Accents (smaller areas) are usually contrasting colors.
That's all there is to it! Have fun!