Editing Logos

[ferrari77]

my team is putting black corrugated material (black cardboard) on our robot for decoration and then putting sponsor logos on that

I have taken the logos and made the white backgrounds transparent so I can make them have a black background however, one of the logos, specifically National Instrument's has black text

Right now it is the blue eagle with black text saying National Instruments

Am I allowed to change teh black text to white and then put it on a black background?
Or is there a way to get a logo that can be used with a black background?

We want to avoid printing it with a white background and putting it on the black cardboard like we did last year, it didnt look that good

Thanks