What style is this and how could I make it?
It looks like 3d.
2d with the top rectangle having a lighter background color or a higher transparency
Yea how can I make that the top is a lighter colour without using double frames?
I think you do, and that’s the way they did it in the image.
I think you can use UIGradient, it’s basically a gradient that you can create in frames by setting the ColorSequence to the way you’d like.
As that other guy said, use a UI Gradient in the frame.
my example to replicate what is seen in the picture you said would be to have the ColorSequence like this.

there are two markers, one at 0.5 with the same color as at 1, and another at 0.499 with the same color as 0
Hope this video helps!
i’d call it the aero theme lol and you could either make a 2-tone image (black and white side) and set transparency very high but not full or make a UIGradient and using @Smojaa’s method!