light], [Dark], or whatever.
Since I do all of this manually anyway, feel free to request a variation of the tag. The actual categories on the site keep it all together in "Grimdark", but I don't mind changing things up a bit. [Grimdark] is good for gory, murder, , ect, but if your only issue is a [Dark] atmosphere, let me know in the categories section of your story submission.
This also goes for shipping. If Fluttershy and Rainbow Dash are "interested" each other, but not "all over" each other, a [Light-Shipping] works perfectly fine.
Hopefully that clears everything up!