ringColor property
Creates ring colors from a single color.
If gradient, then both start(only for > second ring) and end color's of
ring are brightened by intensity %. Else, Color of ring will be consistent
and next ring layer will be brightened by intensity %.
Example:
ringColor = a; gradient=true
1st ring -> Gradient of a->brighten(a)
2nd ring -> Gradient of brighten(a)->brighten(a, 2x)..
ringColors = a; gradient=false
1st ring -> a
2nd ring -> brighten(a)
3rd ring -> brighten(a, 2x)..
Implementation
final Color? ringColor;