The different colour Choice is marking what Choice(s) was made before to help identify it so that you do not re-choose it and go to the area you just came from if you do not wish to, as that option will still be a viable Choice.
The different colour Choice is marking what Choice(s) was made before to help identify it so that you do not re-choose it and go to the area you just came from if you do not wish to, as that option will still be a viable Choice.