Site Theme

[Rhys Gottwald]

I cannot seem to find a clear answer on this question. 

Is there away to apply a custom CSS to a Could instance.  I am not looking for any advance themeing, I just want a way to say all H1 must be blue and All H2 must be red.

I have looked at this page, and I cannot tell if this only applied to a plug in that has been created or if it is a Global Theme, and if it is, is there an example of it i can see somewhere?

Thank you in advance