* fix: prevent crash if undefined color is passed to func fallbackColor
* feat: allow users to pass ring_color param
Before this commit, the ring color was always equal to the title color.
This commit allows the user to pass a ring_color property to allow him
to style the ring color the way he pleases to. If no ring_color is
passed we default to the title color.
* docs: improves ring color documentation
* fix: improve code style
Co-authored-by: rickstaa <rick.staa@outlook.com>