Probably hard for people to compare to their US Switch covers unless you post a picture.
It may just be a regional thing though, because I know Nintendo have had different colors for games from different regions before for WiiU.
The first run in the US is light blue as well. Once they started using the red cases for Mario branded games, MK8 got the same treatment. I kinda like the Mario Games standing out.
Here's something that used to set off my collector OCD:
Retro Tech Select - My Youtube channel. Covers throwback consumer electronics with a focus on "vid'ya games."