"That dudes" name is Nomura and he's the head honcho behind many Square Enix games, so some respect by knowing his name >_>
Sora's clothes are signifigant not because of thier color, but because of what they allow him to do. Supposedly, it's Sora's clothes that allow him to fuse with his friends...
The signifigance of the clothes is that they change color when he goes into drive mode, so it's basically used as a color coded chart...
Red = Valor
Blue = Wisdom
Black = Normal
<Random color> = Possible other drive form
No deep hidden meaning here <_<