Ok, so I created a colorset for myself. I know that it isn't my colorset's doing for this error because I've compared it and checked for any flaws over 10 times, plus it's too simple to really mess up..
When I'm done, I start up Blockland, go to the colorset list, and choose my colorset. It pops up with an error saying that colorSet.txt cannot be saved because colorSet.txt is invalid.
After that, I check the config\server\ file and it's blank for some reason, obviously the reason why it's wrong.
This thread has the exact problem, and I think it was misbelieved to be solved. True, it allows you to use the default colorset, but when you try to change it the error shows up again.