Agreed. The blue stands out more, certainly. Although with a coaster framing it, it won’t stand out too much.
But honestly, people shouldn’t be curious about the discovery center as it won’t be a massive change one way or the other- even with a complete repainting to blue.
What will change the look more than anything by far is the color of the supports and track. Are they going to try to blend it in more a la Hagrids with brown track/support, or have it stand out in a blue and grey a la Hulk.
That will have a significantly different feel for the land depending on which direction they take. There’s pros and cons for each.