What does the reaction of the Community reveal about their attitude towards eye color?
As virtually all the people in the Community are colour blind, they cannot see blue as such but rather as a strange pale shade. Only a few people have eyes like this: namely the Giver, Jonas, Rosemary, Gabe and another little girl too young to be considered a candidate as a Giver.
Since it is considered rude to make a remark about anyone's difference, these people are probably considered to be stigmatized since they are a indeed a minority. It is interesting to note, though (although Lowry herself never makes the point) that these people are all set apart in some way and most of them have been, are or are going to be taking on the highest role in the Community, namely that of the Giver. It is a privilege to be the Giver but also a tremendous burden, as the Memories of the past bring on much psychological and even physical suffering. How Jonas and the present Giver help re-establish a more normal order within the Community and manage to break up the syndrome of sameness is the main plot and suspense of this story.