HDTV Question....?

I have a 40" LCD Sony Bravia TV. It's a 1080p HDTV.

When I plug in the Ps3 it looks awesome, but when i play the Wii on it the colors look all weird. The Wii looks better on my old little TV. Is there any way to fix this, so that I can play on the HDTV?

I have a 40" LCD Sony Bravia TV. It's a 1080i HDTV.

When I plug in the Ps3 it looks awesome, but when i play the Wii on it the colors look all weird. The Wii looks better on my old little TV. Is there any way to fix this, so that I can play on the HDTV?

Natalie445