Invitation Confusion?

No, but I could see it happening easily enough. Folks zero in on the information printed within the text of the invite, and don't notice what isn't there. In other words, even if the entire card is pink, they don't notice that there is no blue with it. It just looks "baby" to them, and they don't make any mental notes about the lack of blue.
Also, in this day and age, no one wants to assume anything that isn't specified, so even if someone did notice it was all pink, they wouldn't necessarily make the leap that THAT MEANS that the baby is a girl.

But yeah... the invitees aren't looking for "clues" when they open the invite, and probably wouldn't notice the LACK of other colors unless they ALREADY know the baby is a girl. Then it might be more noticeable.
:)

I may not have made the connection either, because my son's favorite color is pink.

I had a baby shower at work, and (I thought) everyone knew that I wasn't finding out the sex of the baby. The invitation was gender neutral (Dr. Seuss). I'm opening up all these cute 'gender neutral' gifts and then get a bunch of boy clothes. Believe me, I was totally grateful (even though I had a girl) because it's the thought that counts. But, the giver of the gift had always been a little, um, obtuse, for a good word, so we all laughed about it!
Later on, my nephew was the true recipient of the cute clothes!

Pink doesn't automatically mean girl, so asking is the best bet for an invitee that doesn't know.

My friend's shower invitations were pink with pale green borders and the headline, "It's a boy!" She just liked the design, it had nothing to do with gender.

I would have assumed it was a girl, BUT I would want to make sure. Who wants a frilly dress for a boy? lol Also I would be glad that people are RSVP-ing! It seems that people have forgotten how to get that done!

I find that so strange. Goes to show how fast paced our lives have become to cause us to not even see the invitation is pink.

People just don't think and that is their standard question when it is a baby shower.

Many people (as in those without children or those who had children before the current princess craze) are unfamiliar with the total pink/blue dichotomy. I had no clue before DS was born that pink was code for girl.