Form Title CSS

[G.deangeli]

Hi Everybody
First of all congratulations for your excellent CKForm Component!
And the well-done documentation provided in several languages

I need do change the font size and color of The Form Title.
But my CSS knowledge is not large enough to do it right : I guess it is about art-postheader, but what item shall I add to the CSS file to have a smaller font-size and a different webcolour?
Thanks
Gérard