i need to make this cake but instead use turqoise flowers istead of purple, what this look nice? what do you think? also how do you get to make turqoise or aquamarine color?

I do know that to get the "Tiffany" type of blue, you use wilton "teal" colour.
I have used it and it is turquoise.
If you don't have it, I have heard that sky blue with a little yellow makes it too.
Hope this helps

I would think to start with a base of blue and add small amounts of green in......

HTH

here's an article that might help
http://www.cakecentral.com/article2-How-To-Color-Your-Icing.html

HTH

thanks everybody for your advice and thanks arwa for the article, it was very helpful. but no one said if the cake would look nicer with two toned turqoise flowers rather than purple flowers on the cake?

oops sorry i forgot tht... i havent really tried using a turqoise for flowers...maybe if u make it very light it will look good. Do post in your pic.

All the best!