Fagus sylvatica PurpureaTricolor (common names are copper beech or purple beech).
According to Wikipedia, such a mutant form of European beech was found for first time in Germany in 1690, and it is assumed that about 99% of all copper beeches in the world are descendants of this copper beech.
By the mid of summer, leaves become dark green.

Nikon Coolpix P950

cropped