I have a blue glossy guitar that I was trying to photograph for product photography practice.
I wanted to have a pink rim light on it, so I angled the flash appropriately and put a pink gel on it. When I clicked the pic, the reflection i got was white, despite using different camera settings and flash powers.
So I assumed that since it is a blue guitar, it is not reflecting other colors. However, when I bring my phone near it and open a pink image on it, I can clearly see the reflection of my screen on the guitar, color and all.