Does anyone have any suggestions about how to remove paint from clothing?

I must have brushed up against some wet paint when I went down to the laundry room, although there were no workers or wet paint signs in sight >:(

Anyway, I now have off-white paint all over the sleeve of my favourite green hoodie. The company doesn’t make that colour anymore, so I really would like to remove it if I can.

I don’t know what kind of paint it is, but I tried scrubbing at it with a bristly brush to no avail. Does anyone know of any product I can use to get this paint off?