lightColor property
final
The lighter of the two colors used to paint the logo.
If possible, the default should be used. It corresponds to the 400 and 900 values of material.Colors.blue from the Material library.
If for some reason that color scheme is impractical, the same entries from material.Colors.amber, material.Colors.red, or material.Colors.indigo colors can be used. These are Flutter's secondary colors.
In extreme cases where none of those four color schemes will work, material.Colors.pink, material.Colors.purple, or material.Colors.cyan can be used. These are Flutter's tertiary colors.
Implementation
final Color lightColor