Colour Range

Apologies if this seems a silly question, but I have searched high and low and have yet to find a solution.

I’ve built my Picade console and am very happy with it, but I have one question that I can’t seem to find an answer to. Is there a way to set the hdmi colour range produced by the Pi2 to full dynamic range (0-255) rather than what appears to be limited (16-235)?

At present blacks appear grey and generally washed out. I am unsure if I am the only one with this problem as I’ve not seen this reported elsewhere. For all intents and purposes everything else displays correctly. I don’t currently have another HDMI screen I can test but would love to know if anyone else has come across this or possibly a config tweak that will help?

Thanks for any info anyone may be able to provide.

Could you take a photo of the screen in use?