Name colours provided by scoreboard teams don't correctly show in normal chat messages, they work everywhere else (tab list, death messages, scoreboard sidebar display, etc).

Steps to reproduce:
1. /scoreboard teams add redtest
2. /scoreboard teams option redtest color red
3. /scoreboard teams join redtest
4. Check tablist, name is red.
5. /kill yourself, name in death message is red.
6. /say test, name is red.
7. Type a message in chat, name defaults to white!

This was working fine up until a few updates ago.