The new uniforms for the entire NFL, as done by Nike, were unveiled early Tuesday, and there's very few big changes when it comes to design around the league, unless you're the Seattle Seahawks. That being said, the actual material used for the uniforms is quite different, leading to some things looking brighter, others looking sleeker and things of that nature.
But again, the actual "design" when it comes to colors and how those colors applied aren't changing a ton. For the Minnesota Vikings, there are a couple changes here and there, though the most noticeable is probably the fact that the yellow line around the neck is more pronounced with the new collars that Nike is running with.
Below, we've got a picture of the model from Darren Rovell to go by. As noted, the yellows are little more pronounced throughout the jersey, especially with the flywire collar:
For some more looks at the jerseys, the Vikings posted a gallery on their official website, including a look at the new gloves, which boast an interesting pattern (for all teams). It shows more of the yellow outline around the numbers, and is worth checking out here.