Purple do not get me started on variegated plants. My favorite summer plant is Canna Stuttgart. I have had it for several years and I have seen some people say their plant reverted to green so I am constantly taking out any green leaves I see to prevent it from reverting.
I noticed the variegation is not as pretty or sharp on the new plants I see in the nurseries and I want to preserve my old plant not have to buy one of the inferior plants sold today. I even keep it growing as a houseplant through the winter.
The variegation in this plant is awesome and it does good in the shade.