Size of title (text "page name" under logo)

Hello,

First of all, thank you very much from Paris for this beautiful theme!

Second :
When i am on a “class single page”, there is a light grey bar with :
– The breadcrumb on the right
– The “title” on the left, which is generally the name of the page with an alt balise like “permalink : name of page”

I can’t find the “class” name of that title to modify it (make it bigger, maybe with a lighter color i don’t know yet…)
I don’t know if my question is understandable “cause my english is not as good as i would love to”, but could you help me by giving me the class name of that title in order to make some customs on it ?

Thank you very much again, regards

Jey