Border color vs Tint color

[paulmars]

I made a version which allows two different colors. Is there any interest here for that?

[paulmars]

not an issue technically

[coneybeare]

sure. make it backwards compatible, so any code changes do not break expected functionality for existing implementations.

[paulmars]

so basically, if there is a tint color use that, border is set use that and fallback to tint?

[paulmars]

here is the first take

#19