add method Null safety
- Color other,
- [dynamic strength]
blue channels of
this Color. The resultant alpha is maintained from
strength would be specified which is used instead.
alphaFromStrength for details on using a value between
2..255 as a shortcut for specifying alpha/opacity override.
+ operator, providing
Color add(Color other, [dynamic strength]) => withAlpha(alphaFromStrength(strength) ?? alpha) + other;