Glow and shadow both work, albeit not together (or not where I can notice) but if you think about it, Glow is adding light, and shadow is adding darkness, and one should cancel the other.
This is a pretty comprehensive list of the available colors:
I ended up just going with white and black, though.
Why, I can smile, and murder while I smile,
And cry 'Content' to that which grieves my heart,
And wet my cheeks with artificial tears,
And frame my face to all occasions.
I can add colours to the chameleon,
Change shapes with Proteus for advantages,
And set the murderous Machiavel to school.
Can I do this, and cannot get a crown?