A deep dive into the Daleks shown in The Planet of the Daleks shows a surprising source for the color schemes. Television Daleks have largely not used bright color schemes, other than those overweight Daleks that Matt Smith faced. But Terry Nation, when putting Daleks into non-Television formats, had used ones with bright color schemes.
The question is whether Gerry Haylock got this color scheme from the Radio Times article, or what?
A careful look at the history of the Daleks owned by Terry Nation shows that it was the other way around.
In 1972 the Daleks in Countdown Comics were shown.
Careful study of pictures of the Terry Nation Daleks showed that in 1972 they still had the color scheme shown in Whickers World.
Further - when Terry Nation was later commissioned to write a 10th Anniversary Dr. Who episode, he borrowed heavily from the story line in Countdown Comics. The title, "Planet of the Daleks", came from Countdown Comics, as did the color schemes.