Change link color using the menu

Hi,

I tried to change the links colors using the graphic UI doing so:
customize > colors >body > link > initial color
I picked my color and saved the new settings.

When i go to a page, my link are black (instead of orange)
If i check, this css rule is applied: .inside-article a

Where is this .inside-article set, how can i change it using the graphic UI ?

Thanks.