So, you think you know about colour? Think again! I thought I knew all about how colour effects interiors. I mean, I've been an interior stylist for 19 years and I've created countless room sets and produced hundreds of mood boards. But it wasn't till I sat down to talk with Applied Colour psychologist Karen Haller, number one best selling author of "The Little Book of Colour. How to use the psychology of colour to transform your life” by Penguin Life that I really got it on a personal level