Feeling a bit blue this winter? Bit green round the gills? That beige box you're sitting in front of right now could well be the problem, according to research conducted by colour therapists for PC World.

The colour experts found the colour of your computer can enhance your positive emotions and offer psychological benefits. Amongst the better colours were blue, tipped to promote tranquility and composure, and red, which encourages commitment for those employees lacking in motivation.

Green offers a serene environment to calm stressed out staff and white was found to focus the mind and encourage clarity of thought.

There are growing ranges of colourful computers available including Apple’s iMac, the Compaq Presario range and the mint green Packard Bell range, but many PC makers are still stuck in the beige box mentality.