Meet the Islands Theme – The New Default Look for JetBrains IDEs

JetBrains introduces the Islands theme as the new default UI across all their IDEs starting with version 2025.3. The theme features rounded corners, balanced spacing, improved tab recognition, and clearer separation between working areas. It includes distinct tool window borders for easier resizing and an optional setting for different tool window backgrounds to emphasize the editor. The design was shaped by user feedback and testing, aiming to create a softer, more comfortable environment that supports focus and productivity while aligning with modern design trends from macOS and Windows 11.