[ol]
1. Give the vote to Colors, as the votes for AC vs. Colors were, at the time of the final vote, 6 to 7 respectively. Were this any other match-up (as in, not including my own submission), I would very likely do this, as a last-minute change of a vote is obvious in its purpose. However, I'm not going to go with this option, as I admittedly cut off the voting time by ~1 hour (which in retrospect was unnecessary, as I could've just done the results when I got back home), as well as the fact that it would obviously seem biased.
2. Give the vote to AC, as the votes after the cut off and counting were 7 vs. 6. However, in any other situation as well (again, as in a match-up where I wasn't personally involved) I would certainly NOT give the vote to the song that benefited from a last-minute change.
3. Void the vote in question of the user that changed their vote after the cut off time (and possibly all votes from that user in that round). This would result in a tie, which would be broken by the tiebreaker of the tournament. It's a decent option.
4. Revote.[/ol]