So I'm making a cake to welcome the newest addition to my sisters family, and I'd like to cover it in pale blue fondant. I have the Americolor royal blue and sky blue gel colors, and am intending on adding just a tiny bit to white fondant. However, I can't decide which gel color to use! My understanding is that the sky blue creates a bit more of a teal shade than the royal blue, which might look quite nice - or totally wrong!

Ideally I'd like to create a shade similar to the fondant on this cake:

Can anyone help point me in the right direction? I also have Americolor electric yellow and leaf green which I've read of some people using with the blue.

Links to other cakes for color comparisons would also be helpful

This may not help much....but I'd definitely try using a small piece of white and do a few tests.  Use just the dab of a toothpick to add your color to it.  If it comes out wrong, wrap it up tightly and you have a bit of new color to use for another time.  Experiment.

I would just use a teeny tiny bit of the sky blue. It's what I use to get a pale blue. Just start with a very tiny bit. You can always add more if needed. 

I would use the sky blue in a very tiny amount. And add more if necessary. To get a teal, you would have to add a tiny bit of green. 

I agree- definitely sky blue.  The picture you're using for inspiration has a bit of a grey tone to it too; you may end up with a brighter blue than you want and you can add just A LITTLE tiny bit of black to tone down the blue. 

Great, thank you for all the responses. I'll start out with a tiny bit of the sky blue and as GixxerChick says I may do a couple of tests first.

Thanks for the suggestion about the black kristinhintz, I do like the greyish tone to the fondant in the picture so I might test a little bit of white fondant with just a teensy dab of the black to see how it turns out.

I'll post a photo of the cake once it's finished :)