Two green screens in FCPX? I am a beginner FCPX user and am currently working on setting up a green screen studio for interviews/podcasts/etc. I am planning on painting a wall with this paint and using a this for my floor mat (in the light green color option). I am planning on doing the keying in either FCPX or Motion, but I am unsure if it (they) will be able to handle to slightly different colors in the same chroma key frame. Is it possible to make the floor and wall, even though they are slightly different shades of green, into one seamless green screen in FCPX or Motion?

Thanks!
It depends, you can typically adjust a tolerance for the level of removal.  If the colors of green are closer than the next nearest color, you should be fine, if not, then you would have to do two keys, though I would expect you should be able to stack two layers to get the necessary transparency.  (Basically keying over a keyed image, since the result of a keyed image is a layer with alpha.)  

Keep in mind that lighting will also be a significant concern and you could always paint the floor tiles as well to get the same color on everything.