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The original was posted on /r/AmItheAsshole by /u/Confident_Cookie_241 on 2023-09-13 00:50:26.

So, I (F17) have a brother (M15) who claims he’s colorblind. When he was younger, all his paintings and drawings seemed normal. The whole colorblind claim started after he turned 10, all because of a light pink t-shirt he perceived as white. My parents joked about him being colorblind since my uncle (my dad’s brother) is. He continued this claim, constantly mentioning it to others, which has always annoyed me because I’m sure he’s lying. I’ve told my parents, but they brush me off, saying I’m just jealous of the attention he gets.

Last week was my birthday. I had a gathering at home with about 25-30 people on the weekend. The topic of his supposed colorblindness came up again, with everyone asking him to identify colors. I, feeling frustrated, asked him to take an Ishihara test on the TV. He agreed after some hesitation. I went up to my room to grab my computer to plug to the TV. But instead of a genuine test, I used a fake Ishihara test, one that anyone could pass. He pretended not to see some numbers, and once the test concluded, I revealed to everyone that it was a fake test, aiming to show he was lying.

The mood turned sour. My brother and parents were furious. My family tried to brush it off, making jokes, and my friends found it amusing. Post-party, my parents were livid, they labeled me as an “attention seeker” and a jealous asshole and grounded me for embarrassing my brother.

I feel like had he been honest, he wouldn’t have been humiliated. So, AITA?