What is the ruling on dyeing head hair black upon the appearance of gray hairs, and dyeing eyebrows dark brown? Does it prevent ablution? And what is the ruling on tying head hair upwards?

There is no objection to dyeing eyebrow hair with a color other than black. It is forbidden to pluck eyebrow hair because it is considered namṣ (plucking of eyebrows), which is cursed. As for trimming or shaving, there is a difference of opinion, and it is better to avoid it. If eyebrow hair becomes long or exceeds its natural limit, there is no objection to tidying it and taking some of it. There is no objection to removing hair between the eyebrows.