Sharks are colour blind!

Sharks are colour blind
It seems choosing the right surfboard and wetsuit shouldnt just be about how much rocker the surfboard has, or how stretchy your next wetsuit will be. Apparently sharks are completely colour blind and mostly see objects clearly if they are dark, or light. Professor Nathan Hart, from the University of Western Australia, said: ‘Its the high contrast against the water rather than the colour itself which is probably attractive to sharks.
‘So you should wear perhaps more muted colours or colours that match the background in the water better.’
This research makes me laugh for a couple of reasons. Who was the mad head who tested this theory out? Also even if you did slip into a blue wetsuit and decide to ride a blue surfboard, wouldnt the shark see a dark figure at the surface? No matter which colour coordination you used to outwit the colour blind fish it would see a dark shadow which they can see clearly?
I have a better idea why not just paint a shark on bottom of the board, this way the shark thinks you are a friend and is more likely to either mate with your board or pass on by? Good job Im not a scientist!