FlatLaf is a modern open-source cross-platform Look and Feel for Java Swing desktop applications.
It looks almost flat (no shadows or gradients), clean, simple and elegant. FlatLaf comes with Light, Dark, IntelliJ and Darcula themes, scales on HiDPI displays and runs on Java 8 or newer.
The look is heavily inspired by Darcula and IntelliJ themes from IntelliJ IDEA 2019.2+ and uses almost the same colors and icons.
FlatLaf can use 3rd party themes created for IntelliJ Platform:
Run demo with java -jar flatlaf-demo-<version>.jar (or double-click it).
Requires Java 8 or newer.
FlatLaf binaries are available on JCenter and Maven Central.
If you use Maven or Gradle, add a dependency with following coordinates to your build script:
groupId: com.formdev
artifactId: flatlaf
version: 0.21
Otherwise download flatlaf-<version>.jar here:
For more information and documentation visit FlatLaf Home