Yellow....? 

Under the heading "Overlordship outside his kingdoms", in the caption for the map showing "Cnut the Great's domains", "allied states" are said to be coloured in "". I see this as a (rather sickly) shade of ! I note that this colour is also given as "yellow" in the descriptions for both the WP .png file and its original on Wikimedia Commons. I'd change the caption and descriptions myself, but don't want to get shouted at! And, while I'm about it, the descriptions for both image files point to "Canute the Great", which of course is now a re-direct, and presumably ought to be changed...