My favourite colour is blue! That doesn’t seem quite enough to say. There are so very many variants of the colour. Sky blue; sea blue; azure blue; navy blue; royal airforce blue; midnight blue; cobalt to name but a few. Then there are all those colours that are sort of blue, but tip over into green as well like turquoise or teal. To make it even more complicated there are rich blues that might almost be purple like the colour of the iris flower in my country. If you go to a DIY store and pick up a colour chart for different paints I expect there are hundreds if not thousands of ways to describe the colour blue – and I don’t even know if we all see the colour in the same way. It is mind boggling!