Oh! I get it, even if I don't know how I did it. Thank you for the input, TIG and Gaeius. Gaeius, thank you very much for making the fixes. I did it on my end, too, to make sure I understood what you did.
Best wishes,
Jed

Here's the model attached. Thank you for the help!
Jed(I just put some walls in to let the shadows fall on something)

Oops, I should have thought an example would be helpful-
I will upload the file as soon as I get to my home computer- thanks!

Hi-
Brand new to Sketchup and to this forum. From the look of the posts I'm in expert hands.
I'm interested in SU for woodworking. I just started drawing a bed frame to build. The other day a few of the faces of the footboard component changed color to a greyish, slightly darker color from the default tan after I'd edited the component. Can't seem to figure out why. It's not the dark grey found on the inside of a form. Almost looks like it is in shadow, even though it is on the lit side of the model.
Any ideas?
Thanks