Recolor tool

[rich2005]

1. Click inside the area using the fuzzy select tool to select the area inside the boundary

2. Switch to the paint pencil tool, and paint inside the active selection EDIT just remembered you do not want anti-aliasing, use the pencil tool instead of the paint tool.

   

when complete turn off the selection Select -> None

note: as mentioned earlier, that image has no anti-aliasing so very straight forward.