What are the 3 progress bars during a Fedora Boot Telling me?

[reg at dwf.com]

What are the 3 progress bars during a Fedora Boot Telling me?
There is a dark blue that runs ahead,
A lite blue that follows it, and
a White bar that overwrites the other two.

Along the same lines, the word 'Fedora 11' is initially blue,
but turns white near the end of the boot.

Is this just pretty graphics, or is there some actual information here?
-- 
                                        Reg.Clemens
                                        reg at dwf.com