No. The five color labels were defined fix in the program code of Lightroom.
then is there a better way to coordinate photos into groups? Exterior photos, Interior, classroom, bathroom, etc.
I am using Lr to organize my project photos.
is there a better way to organize photos into groups or smart collections?
You could use a Color label/star rating combination, keywords, just about anything you can come up with to make your different groups unique.
I recommend keywords
You can have as many as you need, so you can add keywords at a very aggregate level, or if you so desire, you can add keywords at a very detailed level, or mix and match as you need. For most applications, the five color labels aren't enough, even if you add color labels and starts, then you have the problem of remembering the meaning of red with 3 stars; none of this is a problem if you add the keyword "classroom" to a photo, it doesn't limit the number of further keywords you can add, and remembering the meaning is not a problem.
maybe keyword but I dont see a place where I can apply a keyword to an image. I'm used to G**gle Picasa as my photo reference.
The keywording features in the Library module:
that helped. got it. still new to all this. didn't see that the panels on the right were hidden.