I guess that if Sweden bought the Eurofighter they would paint it simular to the scheme on the Gripen. There are different schemes during development but they are all variations of gray. It sounds like a great what-if.
Here´s three different gray schemes
This is the latest with a light gray underside and radome with a smooth curved line. This is the scheme I´m going to use, along with the gray insignias.
This older shceme features a black radome and the lighter gray is on the underside only (But not on the underside of the canards).
This is a very erly Gripen with an all-over gray.
Hope this will help you, it would be great to see a Swedish Eurofighter.