Can I swap the colour of the device that I purchased online during pick-up?

I purchased a Silver Macbook Air online yesterday and only settled for that colour because the Space Grey wasn’t available for pick-up at my desired store. However I checked the website again today and the Space Grey colour is now available for pick-up When I pick it up tomorrow, is it possible to get the Space Grey Macbook Air even when it says Silver on the receipt? It’s just weird that it was unavailable for the day I decide to purchase the device but suddenly available the next day.