I love this purple plant. Can someone tell me what it is?

Pool side at Indigo near Magen's Bay on St Thomas

Udder Delite near Magen's Bay on St Thomas

Jess & Mindy enjoying Udder Delite's famous milkshakes near Magen's Bay on St Thomas

Udder Delite ice cream delivery

Island speak: Soon come!

The view from Heather's house on the south side of St Thomas

The view of Bolong Bay from Heather's house

Parasailer off the coast of St Thomas

Bolongo Bay, St Thomas

Cliffside pool near Bolongo Bay, St Thomas

Bolongo Bay, St Thomas

Bolongo Bay, St Thomas

Paradise Point, St Thomas

Mindy & Jess at Paradise Point on St Thomas

Havensight, St Thomas

Havensight, St Thomas

Havensight, St Thomas

Havensight, St Thomas

Havensight, St Thomas