That would be a nice addition.
Are you using this?
If you open a JIRA issue and attach the code, it will make sure that the changes don't get lost in the mix here. It might be a week or so before I can get back to itext work.
Do you think this is a more natural way to write colors than then formats supported by Color.decode, which is what we can do now?
created jira issue:
I do think this is a natural way to do RGB colors, it conforms to CSS standard so I think most web devs should be familiar. The code above also has support for the alpha chanel (so would be like rgb(100%,0,0,50%) ) but the alpha doesn't seem to affect the rendered pdf.