I have a funeral mass to attend tomorrow night, my close friends dad died, and was wondering what the typical attire was?

I haven't been to a funeral in many years, and it being a mass, I figure a suit to be appropriate. But with how casual my church is during mass, and since I'm not sure about funeral dress nowadays, what is commonplace for an adult male?

I would assume a suit, but is that too dressy if possible? I have a long sleeve dress shirt, slacks, and a tie I could wear, but it's a dark red shirt and I kinda prefer black to a funeral as is custom.

I know it seems odd to ask, but I'm wondering because I have to borrow a suit from my coworker if a suit would be more appropriate, my old one is too big.

Thanks in advance.