Quote: Chappers @ October 10 2011, 12:18 PM BSTAre you colourblind? Not being rude - just asking.
Not that I am aware of, the centre one in the bottom panel looks yellow to me and in the top one it looks brown 
Horizon. Page 2
I think that's what you're supposed to see but the the diagram on the right shows they're exactly the same colour.
Well yes, but they are not. The pic to the right is something else entirely.
Marc, have you tried covering the screen inbetween the 4 tiles in question? They are all the same brown!
The other episode about colour was very good as well.
Due to their different classification of colour,The Himba Tribe can find the odd colour in the ring on the left immediately but take a lot longer to find the odd one out in the ring on the right.
For us of course it's the other way round.
Quote: Marc P @ October 11 2011, 10:38 PM BSTWell yes, but they are not. The pic to the right is something else entirely.
Everything you have said makes perfect sense to me, I have no idea what they are talking about either.
But there again if there is an IQ scale for processing optical illusions I'm more on the Sarah Palin end of things, but I'm pretty sure I'd see a ship coming.
Quote: Marc P @ October 11 2011, 10:38 PM BSTWell yes, but they are not. The pic to the right is something else entirely.
The point being made is that these things look different due to the presence of things around them. The coloured squares that look the same in the right image haven't been changed from those in the left image, but everything surrounding them has. But I suspect you know this anyway, so I might as well add that it looks like the most complicated Rubik's cube ever and get out of here.
Sorry Badge but I still have no clue. Maybe I am colour blind or something, but one looks yellow one looks brown and still looks the same when I cover up the tiles around with my hand. 
The top one looks a different shade to me no matter how much I try to cover it. I'm with Marc on this
Do they still look different?
Mine eyes had been deceived 
Quote: Nogget @ October 12 2011, 10:03 AM BSTDo they still look different?
Not so much there no!
Quote: Steve Sunshine @ October 11 2011, 11:02 PM BSTThe other episode about colour was very good as well.
Due to their different classification of colour,The Himba Tribe can find the odd colour in the ring on the left immediately but take a lot longer to find the odd one out in the ring on the right.
For us of course it's the other way round.
They were talking about how language plays a big part in Colour perception
The Himba only have 5 or so words for colour
and different greens are under different categories.
I think I know which green is different on the left but only because they pointed it out in the programme.
But it was amazing to see them struggle with the seemingly obvious blue on the right
Quote: Steve Sunshine @ October 12 2011, 7:23 PM BSTThey were talking about how language plays a big part in Colour perception
The Himba only have 5 or so words for colour
and different greens are under different categories.I think I know which green is different on the left but only because they pointed it out in the programme.
But it was amazing to see them struggle with the seemingly obvious blue on the right
Which green is different then?
I can convince myself that each of them looks slightly different if I stare long enough!
Is it the one in the same position as the blue on the other circle?