Funeral attire help

Need some help as this is for a catholic funeral in a church.

Been doing some searching, and the best place I have found is Wildfang, if anyone has another place I'm open to it.

Was looking to go full black with the following: Blazer, Wide Leg Pants, and Oxford Button Up (short sleeve).

Or is the full black look something that isn't done anymore for this type of setting? With the above blazer and pants, but with a color button up instead? Oxford Button Up from above but in Green Stone or Blue Sky White. Or something completely different or mix and match with something else.