This is directly from the July 2004 edition of Honda ServiceNews:
If you’re doing a PDI on a new Honda model,
don’t be surprised if you see blue fluid in the
radiator and in the reserve tank. It’s not
windshield washer fluid or minty-fresh
mouthwash. It’s Honda’s latest Long Life
Antifreeze/Coolant Type 2, and it’s now the
factory-fill.
This new coolant is exactly the same stuff that’s
been the factory-fill in all ’01 and later Honda
models, only now it’s dark blue instead of green
so it’s easy to tell apart from the earlier Type 1
coolant. It’s completely compatible with the
familiar green Type 2 coolant, so there’s no
problem if you mix them.