Why is my ex sporting my favorite color?

My ex's favorite color is red. Or at least, it was. We don't talk anymore but we have enough mutual friends that we sometimes cross paths. Prior to him ghosting me, he always wore red, his profile pictures on social media were red, etc, but after we broke up he switched to green. Green is my favorite color, and he knew this well, he always incorporated green into anything he gifted me. He paid attention to details. It gets weirder. It's not just my favorite color. His whole style completely changed. His social media and his outfits did a full 180 after we broke up to match my aesthetic. All browns and greens and misty forest vibes. He even dyed his hair from black and red to brown. I keep noticing it whenever I walk past him or when one of my friends is opening his snaps and I'm next to them. I don't know if I'm overreacting but it seems pretty weird to me. What the heck is going on?

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Update: I met the guy he dated before me. And he dresses just how our ex used to dress when I was dating him. Apparently the dude just copies his ex's after they break up. It's pretty creepy but at least I know what's going on.
Why is my ex sporting my favorite color?
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