Labour time to swap out calipers?

[///M3_F80]

I need to swap out my front and rear driver side only, calipers. Simply swapping them from one oem set to another oem set. Wondering if anyone knows how long this might take to do? I would call my dealer but they are closed until Tuesday.

Long story short, previous owner of my car painted the calipers a diff colour and when he had them painted back to the OEM blue they did not turn out - they are a bit lighter and it drives me nuts (OCD issues). I have a set of oem coloured calipers waiting for me but want to know labour cost to see if it's worth it.