I was changing a color in the elements, and my style was destroyed. Is this a database problem? How do I diagnose this problem? Thanks for any help.
Well, you didn't provide the link as I asked - but a little detective work led me to it I think.. and this is why I wanted your link ...
This is what I see when I go to the site. Looks nothing like your example
Probably best to work on a copy of your database for testing purposes.
But I would check: go to <url>/install/ and rebuild the master database. Does the same thing happen? If so, what's in your database represents the final ("after") display and is totally inconsistent with the cached ("before") display you have. There isn't really much that can be done to totally resolve that; the data is somehow missing and the cache has become out of date. The customizations would likely need to be done again. You might be able to find them from an older backup (where you can export the style or at least refer to it).
I have no idea how that'd happen as it's not something I've ever seen reported before. It would be caused by cached values not being updated when the underlying data is changed or sort of the other way. For example, manual manipulations to the database such as via a DB restore may not change these caches. Other than that, the only thing I could suggest is an add-on.
Unfortunately, root cause analysis isn't necessarily helpful here as it won't allow you to undo the state as the raw data isn't there.
Given that I haven't seen this before and I don't know how it could have happened, it's difficult to say with any confidence. An ideal thing may be to look for your style in a backup and then try to compare the differences (such as from the exported XML).