Some plants are equally beautiful from above and from below...
Like Rhododendron 'Wine and Roses' for example. This was first sold a few years ago in large quantities as an all singing and dancing must have gift for mother's day. And why not being an evergreen, hardy plant with lovely bright pink blooms and deep green foliage.
Another example is Brachyglottis repanda. The older leaves are rather large and glossy green while the new ones have a powdery, light brown colour to them.
Viewed from below, they are luminescent silver, even white...
I'm not sure whether the colouration of these leaves from below is still considered as an Indumentum. But I know the plant below, Rhododendron mallotum is.