There are many hydrangeas that could be called red (depending on you own eyes, quality of computer's monitor and lighting conditions when picture was taken), but you have to have or create pretty high soil's pH, definitely in 7's, in order to achieve red part of the spectrum. Also, don't forgot that flower's color may fade As a side effect, too high of pH may lead to iron deficiency and chlorosis.
Is this red enough to your liking?
Paris (in pot, pH 7.2)
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Glowing Ember (in pot, pH 7.1)

Princess Beatrix (in pot, ph 7.0)

A church down the road from me has a couple of dark true reds that bloom every summer. I stopped and ask which ones they were and nobody seemed to know so I am going to try and take starts from them this fall. They are a really deep red not pink.

Madeyna, why don't you provide the church with a free soil test? It would benefit you to know what the pH is in there and how much of other minerals that soil has so you can try to simulate it in your garden as much as possible.

Thats not a bad idea. I would be surpised if they care what it is though. She told me when those bushs were growing to far out into the sidewalk they had someone with a chainsaw come in and wack them way back. I hadn,t thought about the soil before but they are flanked on all sides with cement so probly probly 7 or above. I hadn,t realized until I read the post above that reds like a higher ph.

I cann,t seem to start a thread today for some reason so I though I would try this way instead. Safeway has true red hydrangeas in kelso washington at the store next to the freeway. These are as red as red can get not dark pink.

Just saw an ad for Royal Red Hydrangeas which are supposed to be really red and it is suggested to add some lime. However what interested me more is the fact that they are supposed to like full sun. Am a bit dubious about that as I always associate hydrangeas with part shade.
Has anybody experience with a red hydrangea doing well in full sun ?

In the northern climates you can get away with full sun. Especially New England and Canada. Of course, in those zones, the hydrangea's winter hardiness then becomes an important consideration. Macrophyllas normally start having trouble in Zones 5-7 but some have been developed that can withstand the cold in those zones. The selection is not huge so many people switch to use paniculatas, etc