Splash screen colour issues

[Eugene L.]

Hello everyone, I have a FreeBSD 7.1-Release (generic kernel), and I am 
trying to make splash screen feature work properly, so I followed the 
procedure described in handbook and the splash screen actually loads, 
except the black is now white, red is violet, etc.

So all the colours of the bitmap are messed up, and I checked, they fit 
the requirements and I've tried other pics and pcx format. I tried gimp, 
photoshop. The issue isn't pic related

What could possibly be the reason?

I use Sapphire Radeon X1600 Pro AGP