If there is a noticeable color contrast, see how it affects your reading of the portrait. Start with the featured portrait, then see where your eye goes as you move through the gallery.

A gallery portrait for a closer look at composition
From the portrait collection
A person pictured in the image collection
From this gallery of portrait images
A portrait to examine from edge to edge
A portrait presented for closer viewing
A portrait with attention to how the subject is placed
A frame from the featured sequence