Grackles have interesting color attributes. See them in bright sunlight and they appear almost totally black (except for that iridescent head). See them in diffused light, and in addition to blue, you see brown, purple, and even a little green. But what I like the most about grackles is that piercing yellow eye.
Normally I don’t think of Grackles as birds of beauty – but your photo and comments certainly cause me to see them differently. I never paid attention to their eyes. Thanks for posting.