As much as it sucks, it's a feeling we all experience, once in a while. For whatever reason, we all have felt sad or in other words we've all been 'blue'. While it is common knowledge that it means feeling sad, sorrowed, depressed and a whole bunch of other gut-wrenching emotions, we've never questioned the association. Why would we use a colour to describe our feeling? So what is it with the colour blue? Why is it associated with feeling sad?

Sciencedaily has a different theory altogether, based on recent scientific research. The research says - The associations we make between emotion and colour go beyond mere metaphor. The results of two studies indicate that feeling sadness may actually change how we perceive colour.