Maja,
There is in Hawaii a tree type (Hibiscus Tilleaceous)sp? of Hibiscus that can have three shades of color on the same tree other than that I would guess that three different varieties were rooted in the same pot and braided for this affect. I have bought a few for the garden center this year that had two types in a pot. These were not braided. I am not much on the formal braiding myself but each to their own.
Happy Growing David

There are companies that braid different colors together. There is also a Hibiscus mutabilis that has flowers that change color as they age, so you end up with different colors on the same tree from the different aged flowers.

I have a hibiscus plant.. but im not sure what type it is because I cant find any hibiscus with the same leaf. The leaf on my plant is like a maple leaf. The flowers are a salmon color. Can you tell me what type of hybiscus I have?

I have a hibiscus that has a single bloom yellow and a double bloom salmon color on the same plant..it is gorgeous ..the only thing I know about it is it was called multi colored Hibiscus when I bought it at WalMart.. If anyone is interested in seeing it please email me at wbradford@aol.com and I will be glad to send you a picture of it..

I am pretty new to the wonderful world of hibiscus world but i thought i would throw another suggestion how there is multi-colored blooms. I've been reading a lot and just learned about this... I think it could very well be grafting. Its where they bond a new branch to existing rooted cutting. Here is a couple of links to fill ya a little more on it:
http://users.bigpond.net.au/hibiscus/Grafting/grafting.htm

http://www.hibiscusworld.com/graft/graft.htm