The yoke and top of the sleeves is one of the
James Brett marble yarns (Shade 27) with dark red, dark green and gold and purple. I have used some plain dark red (Sirdar Click Chunky) within the yoke and have knitted below the yoke so far in the plain dark red. I have some gold chunky wool but it is slightly thicker that the James Brett chunky and the Sirdar Click Chunky. I have four plain red left and will see how far half of that goes on the body of the jumper, allowing one ball each for the sleeves. James Brett does not make plain Chunky yarn, and Sirdar Click, my most favourite yarn, is now discontinued.
The local shop sells Scheepjes yarn, which if think is available in lots of colours.