Try Elisi (elisiapp.com). We've been improving for 2 years and lots of users love us. Source: about 3 years ago

? What is the base name of your application? Jhispterdemo ? Which *type* of application would you like to create? Monolithic application (recommended for simple projects) ? What is your default Java package name? com.mycompany.myapp ? Would you like to use Maven or Gradle for building the backend? Gradle ? Do you want to make it reactive with Spring WebFlux? Yes ? Which *type* of authentication would you like to... - Source: dev.to / 8 months ago

The colors primarily, I suppose. Something similar to what you see in https://bootswatch.com/. Source: over 1 year ago

That ^ . And I’ve found the Bootswatch page a very helpful visual aid. https://bootswatch.com/. Source: over 1 year ago

Themes are now supported. Visit Bootswatch for more details. To select a theme use the new option APPSETTINGS_THEME as docker environment variable or in the appsettings.json file. Source: over 1 year ago

Others have said Bootstrap already, let me just chime in and point you towards bootswatch (https://bootswatch.com/) , they have great, free themes with great examples, I basically learned bootstrap in large parts by copying example code from their site and tweaking it to my needs / dissecting and trying to understand it. Source: over 1 year ago