With last beta: https://dl.dropboxusercontent.com/u/13064071/plantuml.jar
You can now have:
@startuml
title
|= |= table |= header |
| a | table | row |
|<#FF8080> red |<#80FF80> green |<#8080FF> blue |
<#yellow>| b | table | row |
endtitle
start
@enduml
Is this what you are looking for ?
For odd-even rows colorings, the most difficult is to find a nice syntax.
Any suggestions ?
We could allow something like <odd:#yellow><even:#blue> in the table header ?