I am working with Geoserver for some weeks now and were able to deploy some services already. For my thematic map (e.g. temperature) I created a custom style displaying all tiles in specific colors (blue, yellow, red). Therefore I want to create a legend, but I really dont know how to do this. This legend should show 3 polygons in 3 different colors and some text right of it. Something like "[red polygon] > 30". I would appreciate any sort of support.