there are many roblox made icons inside studio folder and some of them look fitting with proper gui design (chrome like) for seamless coregui-gamegui experience
would it be against terms of service if i cropped some of them and reuploaded as decals back to roblox for use in game
Well yeah, It’s their intellectual property, and if they find out you’re using it, you could be in a lot of trouble. Of course contact them if you’re taking the risk of using their IP’s.