Yes - you would be "discussed". I don't know if it would keep you from getting a temple recommend, if all else was in order. But you'd be classed with people who wear blue shirts with ties, instead of white ones and men with beards. But not as discussed as people who had tattoos or multiple piercings. That would be REALLY wrong.
Aw, that sort of made me miss little, stupid ways to feel "good" and "righteous" that Mormonism provides and miss the luxury of worrying about little, stupid problems instead of world hunger and stuff that bother other Christians.
I wanted to do that as a teenager, but my parents staunchly said "NO." Not sure if they can pull your temple recommend for it, but I imagine people would come down harder on, say, a blue-haired boy passing the sacrament than a young woman who decided to dye her hair.
They'd both get the side eye for sure, but they're very particular about how the Priesthood ought to present themselves (no facial hair, no long hair, white shirts and ties ONLY, etc.) The young woman might get privately pulled aside or gossiped about behind her back, but in my experience the boy is more likely to be publicly put into place one way or another.
I attended there was a married mom who went to the temple who had bright pink streaks in her hair. Her whole family of origin was looked down upon because they did not conform to the "look." There was a six month program based upon this one family trying to get the boys to cut their hair and boys and girls keep natural colors in. It didn't work. They all looked the way they wanted and most of the kids left the church as soon as they could.
I have a sister who's 17. She is VERY against the Mormon church AND a lesbian. A few months ago, in rebellion to being called the Laural President, she died her hair Hot Pink with purple stripes. My parents FLIPPED their shit and the bishop had a meeting with her to discuss this "terrible issue." She agreed to fix it.
The next day, she shaved her head..I dont mean a buzz cut. She straight razored it. Bald as a cueball. I never laughed so hard in my life.
Needless to say she hasnt been back to church and recently moved out with her girlfriend. Funny stuff.
Some years ago, it was “in” for teenage guys to bleach part of their hair blond. One day in SM it hit me that every single deacon serving the sacrament had partially bleached-blond hair. I was amused but also surprised that they were able to get away with it.
My step brother is the only active Mormon in his large extended family, they were all baptized but not one of them has been to church in 20 years. His mom and my dad met in a bar.
When he decided to go on a mission, the leadership knew he wasn't being forced to church by his family and I think they were afraid of being too hard on him and driving him away, so he got away with a lot of things.
He dyed his hair electric blue and kept it that way until the week before he left for the MTC. If you listened to the murmmers from the older people in his ward you would have thought he walking around naked and handing out drugs to all the kids. But nobody said anything directly to him.
He was aware of the murmers and wanted to shock them so he wore a Bud-Lite tie to his farewell at the church. It worked.