THE Hydro is already famous for the sometimes eerie night time glow it gives to the Clydeside.

The venue's technicians have the mind blogging choice of more than 12million colour combinations but very often the final word in the lighting effect goes to the performer.

Purple Rain was the name of the sixth studio album by US artist Prince, which became the soundtrack to the 1984 film of the same name.

So little wonder the arena was basked in purple when Prince came to town.

Promoters for Beyonce went for the colour pink, while other distinct colours are requested by charities.

A Hydro official explained: "Aside from experiencing a live event, one of the talking points of the Hydro has been arena's ability to glow in practically any colour requested.

"Lighting up the SSE Hydro is very much a venue decision and of course, our 'usual' colours are that of our main sponsor, SSE. However, we do sometimes get requests from artist's promoters and we consider them all. Similarly, when a charity approaches us to light up the arena in a specific colour, if there is an event on, we have to run this past the promoter."