Pink glitch effect

Welcome Armaankarnawal,

Thank you for using Apple Support Communities. Based on your post, there was a pink glitch and then your iPhone restarted on its own. We'll do our best to assist with this.

This could be a random issue or not, depending on what happened and continues to occur after this situation. When the iPhone started up after this, did the issue continue to occur or only this one time? Do you ever see this glitch happen while using the iPhone?

If the issue hasn't returned, then we probably wouldn't be concerned. It could have been caused by a variety of factors. However, we'd keep an eye out to make sure it doesn't continue to happen.

However, if the issue returns or continues to occur, then we'd recommend checking on the Battery Health in Settings > Battery > Battery Health. If the capacity is at 80% or lower, it could be caused by needing a replacement battery.

If the battery is in good condition, then it would be best to bring in the iPhone for an inspection: iPhone Repair and Service

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Wishing you well, take care.