Access Imported Tiled Landscape Color Data

I have imported both greyscale and B&W image files to create Tiled Landscapes.
(Both can contain color data)

The Unreal Engine obviously imports and recognizes color data from these files.
As such is evident in the World Composition thumbnails, where the landscape tiles can be seen in full color, prior to any painting, materials, etc.

My question is::

How can we access this color data from the tiled landscape files, and tell the engine to color our landscape those colors??
This would save a lot of time and effort while painting large tiled landscapes,