Apologies if this brand of stamp "is'nt your bag" as Austin Powers would say, but I seem to be able to colour in the Penny Black images better than any other brand. I have done a few magnolia in the past but having so few variations of colours felt that I was getting nowhere near the results as I have seen from other members so rather pathetically have given up (at least until I get more shades!)
I got my first copics at Christmas and although the cards below have been done using promarkers, the results I have had with my copics has been even better (IMO!)
Penny Black Hedgehog Wishes For Kisses Christmas Card by leelulumpkin - Cards and Paper Crafts at Splitcoaststampers
Penny Black Witchy Mouse Halloween Card by leelulumpkin - Cards and Paper Crafts at Splitcoaststampers
A big plus for me too (being a newbie) is that all of the PB stamps come with a coloured picture on top of the stamp which I have found invaluable as a way of practising my feeble efforts.
For me that is one of the downside of clear sets, (although a rare few do) having a ready coloured image to copy would be fantastic if the companies included those. Then when we get more confident we could put our own colour combo's into action.
Sorry if this is of no help whatsoever and happy colouring! x