Hi MrBrown,
Following is the list of ranks with the relevant belt (and uniform):
10th Gup: White Belt (white)
9th Gup : White Belt with one blue stripe on tip (white)
8th Gup : Orange Belt (white)
7th Gup : Orange Belt with one blue stripe on tip (white)
6th Gup : Green Belt (white with green lapel trim)
5th Gup : Green Belt with one blue stripe on tip (white with green lapel trim)
4th Gup : Green Belt with two blue stripes on tip (white with green lapel trim)
3rd Gup : Red Belt (white with red lapel trim)
2nd Gup : Red Belt with one blue stripe on tip (same)
1st Gup : Red Belt with two blue stripes on tip (same)
Note that actually there is no Black belt but rather a Midnight Blue one (however sometimes trainers tend to give Black belts in order to avoid confusion).
Dan 1-3 are called 'You Dan Ja' and senior Dan 4-8 are called 'Ko Dan Ja'.
They all have same uniform: White with lapel, sleeves, and borders trimmed.
1st Dan : Midnight Blue Belt
2nd Dan : Midnight Blue Belt with two white stripes on tip
3rd Dan : Midnight Blue Belt with three white stripes on tip
4th to 8th Dan :Midnight Blue Belt with red stipe in center of belt all around
Hope that's what you were looking for.
Osher
P.S.
You may find the foloowing link helpful http://www.channeltownkarate.com/