Gee Andy.....I took your advice and couldn't see a thing at first...
...as my "Joo Janta 200 Super-Chromatic Peril Sensitive Sunglasses" went totally black! (This will only make sense to Hitchhiker's Galaxy Guide fans)
I mean *really* black.
I quickly realised after taking them off, to see what all the fuss was about, was not a good move....and briskly replaced them.
As Yoda would say: Certainly colourful it is!