Have a look at
1958 | 1- - 0968 | Flight Archive (Interesting comment re the last BEA Viscount!) and
http://www.flightglobal.com/pdfarchi...20-%00389.html which show the scheme on first flight and confirm the duck egg blue.
The photo which heads the topic is, I think an airbrushed pic which was done some time ago for a flight sim using the actual duck egg blue, navy blue, gold and white colours but in a format that was never applied.
In the only photos I've ever seen - and when I saw the aircraft in 1961 - it was eactly as shown in the photos shown in the links and that of the of the model, i.e. as first flown and there was a photo (possibly in Air Pic, maybe in Flight)taken around 1963 showing the aircraft in the same old scheme,without engines - though I can't lay my hands on the copy.