Having Material export as same color?

Hello, this may be very confusing I am very new to Unreal so bare with me. But I have a premade tree or grass for example and it has the textures on them and such. But when I want to edit the actual mesh and put the texture on the mesh in BLENDER, it comes out in a grayscale or its just gray. Is there anyway that I could export the material/texture keeping its color and not the gray?

Examples:

Imported Texture/Object

How it is supposed to look

I am not worried about the transparency part I just want to get the actual color if that’s possible