Here's the wording of Advanced SLAM:
After performing a SLAM action, if you did not overlap an obstacle or another ship, you may perform a free action.
I don't see how that discusses or implies anything about the color of the SLAM maneuver.
I'm not sure when this message will appear (Admin has to approve my posts at this point) so this may be addressed by the time it does, but I'm confused as to why this is an issue. The K-Wing doesn't have any red maneuvers, so the only question would be if a green one removes stress. If you're stressed, however, then you cannot perform the SLAM action since you cannot perform actions while stressed. Am I missing something?