Part the Waterveil

If the non-awaken part of the spell requires a target, you must choose a legal target. You can’t cast the spell if you can’t choose a legal target for each instance of the word “target” (though you only need a legal target for the awaken ability if you’re casting the spell for its awaken cost).

Awaken doesn’t give the land you control a color. As most lands are colorless, in most cases the resulting land creature will also be colorless.

The land will retain any other types, subtypes, or supertypes it previously had. It will also retain any mana abilities it had as a result of those subtypes. For example, a Forest that’s turned into a creature this way can still be tapped for {G}.