So I selected 3 shades of purple for the new design and started the "painting".
As base I used a dark purple polish: Rimmel I Love Lasting Finish.
Rimmel - Nr. 180 Purple Pulse
The first set of clouds is made of a light lilac. As you can see here, my cloud is more like a pyramid. :-)
Golden Rose - Nr. 182
The second set of clouds should have been of a medium mauve color, but it can hardly be seen on the nail.
Natty Orkide - Nr. 392
The "big" result:
After I finished my first attempt of a cloud manicure I applied Rimmel's Mattifing Top Coat to"hide" the mistakes.