Changing text colour in messages box

Hi

Great theme, really clean, like it.

I've been playing with it for a while and have gradually been tailoring for my needs. However I have come up against a problem.

The problem is with the messages box i.e. the box that comes up when you add some content e.g. when you add a page, at the top is the message box that says "Your page has been successfully added" (or words to that effect). I have somehow managed to change the text colour within that box to a very light grey... This makes it unreadable on the white background.. The thing is I don't know where I changed that text colour (I don't even remember selecting a light grey as a colour). I guess I could change the background of the box to something darker but really I'd like to change the text colour

Can you point me to where I would change the text colour for this particular message box? Because try as I might I just can't find where that code is located.

Thanks