found it!
www.xrite.com/custom_page.aspx?pageid=77&lang=en
( Citizen Cavy Admires your passion for conformity, Wed 26 Feb 2014, 10:30, 1 reply, 11 years ago)

this looks like something to make my next tube journey more fun

( rachelswipe with a fork, Wed 26 Feb 2014, 10:31, Reply)

I got a perfect score when i did it
so, that's your target
( Citizen Cavy Admires your passion for conformity, Wed 26 Feb 2014, 10:33, Reply)

I got 13
At a certain point on each line I went "close enough". I'm not colour deficient, I'm energy efficient.
( The Light in Chains don't touch the Pope's boner, Wed 26 Feb 2014, 10:51, Reply)

I got 19 : (
I seem to have some problem with the blue range.

Have you played blendoku? It's either the best game ever or Satan's own plaything. I can't put the bastard down.
( b3th Not shit. Not mod., Wed 26 Feb 2014, 10:54, Reply)

Fuck!
That looks good and really fucking hard!
( sporters I’m sincerely gratitude to you, Wed 26 Feb 2014, 10:56, Reply)

The simple levels are easy-ish
By the time you get to the master levels, it gets fiendish.

I think, because I spend so much time playing with colours in illustrator, I found it relatively easy.
( b3th Not shit. Not mod., Wed 26 Feb 2014, 10:57, Reply)

oh god that does look monstrous

( The Light in Chains don't touch the Pope's boner, Wed 26 Feb 2014, 10:58, Reply)

It's really fab. I have it on both the phone and the iPad.
The master levels are a bit too complicated for the phone to handle, as you can't actually 'zoom' the images.
( b3th Not shit. Not mod., Wed 26 Feb 2014, 11:03, Reply)

78
does this mean im colour blind as well as deaf, or I just did it quickly and wasn't too arsed.
( GeordieJay Bummers are deaf, Wed 26 Feb 2014, 11:18, Reply)

I did all 4 though, yeah?

( GeordieJay Bummers are deaf, Wed 26 Feb 2014, 11:19, Reply)

I'm a bit worried I have a better colour sense than a gay man

( The Light in Chains don't touch the Pope's boner, Wed 26 Feb 2014, 11:58, Reply)