It could be more cultural than psychological. People weren’t used to blue food until recently when blue became the “hot” color for snacks and candies (e.g., blue M&M’s). I think if you were to duplicate the same experiment with people who were born after, say, 1985, I think they would be more likely to eat the food.
Blue is one of the intermittently fashionable colors in <cough, cough> culinary art. Blue and purple food was really fashionable in 16th century Germany, for example.
I’d agree that a modern audience accustomed to eating foods of weird colors might fare better than Sir Alfred’s poor guests, but you’d be surprised on how weird people get about oddly colored food. Give a friend a blood orange and watch the reaction.
Actually, blueberries are sort of clear/whitish on the inside - only the skins are blue.
You could always bring a Blue Plate Special.
Poi? If I remember correctly from my trip to Hawaii, it was blue-ish to purple-ish. Everyone I was with thought it was terrible but I like it.
I don’t think they’re still available, but these Dorito chips would have been an interesting way to go.
Just a thought, but if the group you are feasting with likes risque humour. Maybe a couple of ‘blue’ rude foods (sausages o dip into cheese and mustard sauce, Jello’s with cherrys on top, that sort of thing) ?