How to generate a legend with colors in PlantUML?

Question

I want to color classes in my class diagram, based on a certain criteria, and then display a legend, that would look roughly like:

If I could add an HTML table within PlantUML's legend and endlegend, I could achieve this by changing the cell backgrounds. However, adding the HTML <table> doesn't work. I also tried using PlantUML's salt to insert a table, but I couldn't find any way to color the cells of the table.

Is there any way to achieve this?

Answer 1

I've tried nfec's solution and it was not working for me, but it started me off on a solution that did work. Here is what I got:

legend right     |Color| Type |     |<#FF0000>| Type A class|     |<#00FF00>| Type B class|     |<#0000FF>| Type C class| endlegend 

This is how it looks like:

Answer 2

This is not perfect, but you can use a creole table. (see http://plantuml.sourceforge.net/creole.html )

@startuml class foo   legend  |= |= Type |  |<back:#FF0000>   </back>| Type A class |  |<back:#00FF00>   </back>| Type B class |  |<back:blue>   </back>| Type C class |  endlegend  @enduml 

There are some drawing artifacts, but is it what you are expecting ?

From the plantuml forum. Where they allowed to copy this answer here.

Yes, please copy/paste our answer to StackOverflow : it would indeed by helpful

http://plantuml.sourceforge.net/qa/?qa=3596/how-to-generate-a-legend-with-colors-in-plantuml