Christmas season is around the corner and I thought red/bright color fishes might just bring out the festive mood into the earthly-toned Biotope sqaurium. A couple of non-agressive colorful betta came to mind as an easy choice. They are easy fish, and I will add different color to this group if I spotted any in LFS.
This is lavender female betta, not blue in color..
Royal blue betta
Purple betta with red fins
Merry Christmas!