Titlebar doesnt become acrylic, instead stays as my windows accent color

[DmanMC]

[DmanMC]

one more thing, it still changes the color of the loading screen while in fullscreen,

[PSJahn]

It seems most likely to me that you have this Windows setting enabled: (Personalization>Colors)

This is what the window looks like with the setting enabled:

And this is what it looks like with the setting disabled:

[DmanMC]

is there a way to override it for minecraft only?

[DmanMC]

if not, ill just deal with it, its not too terrible

[PSJahn]

is there a way to override it for minecraft only?

Not possible as to my knowledge.