I'm giving my "new" 2005 coupe the once-over after having it sit for a few days (waiting not so patiently

).
There was a dollar-coin size puddle of blue fluid on the floor just behind the right (passenger's) front tire. There were traces on the very bottom of the fender, but no signs from above (around the battery, etc.).
The fluid didn't seem acidic, so I don't think it was the battery. Unfortunately both the antifreeze and the windshield washer (WW) fluids are both blue, and of similar "feel".
I'm guessing the WW reservoir or line (pump under there too?). What say you?
If I pull the front tire and remove the black plastic inner-fender splashshield, are the WW parts accessible? I don't have a service manual yet.
Thanks!