I'm pretty sure that anthocyanin is the pigment responsible for red- black coloration in bromeliads (and a lot of other plant families, too). The chlorophyll is there, too, but it's masked (dominated) by the anthocyanin.
With our deciduous trees, it's a bit different. The chlorophyll dominates all summer, producing the green that we see. But the pigments responsible for the fall color show are already in the leaves. It's only when the plant stops producing chlorophyll that we see the yellows or reds that have been masked all spring and summer.
I've seen some interesting articles on adaptations by broms to make the most efficient use of light. Fenestration, glyphs, bands, stripes, and striations are pleasing to our eyes, but the plants often have developed those characters to maximize the amount of light that they can capture.
Sorry, I couldn't find any articles in a quick check of the bsi or fcbs site. Hopefully someone else has seen them somewhere. Paul