Diana makes an excellent point. You can wear wardrobe items that are high or low contrast to each other. You can wear wardrobe items that are high or low contrast to your complexion. AND your complexion can be high or low contrast. So mix it up in which ever which way makes you feel fab!
Alasse, you have high contrast colouring and for the most part wear low contrast outfits. At least, that's my impression. Do you feel the same way?
Jenn, you have high contrast colouring and wear medium and low contrast outfits.
Ginger, if the guidelines are helpful, by all means use them.
Sally, you are naturally bookending that outfit with light shoes because of your light hair - and I tend to do the same.
K.Period, you have a low/medium contrast complexion and dress medium/high contrast outfits. It suits you - and I heard your little cough!
La Pedestrienne, I haven't noticed feeling calmer and more serious in low contrast outfits. I am as energized in whatever I wear - but wearing certain colours makes me happier than wearing others.