colorFor static method

Color colorFor(
  1. BuildContext context,
  2. String name
)

Deterministically picks a stable background color for name from the theme's tonal palette.

The same name always maps to the same color, so avatars stay visually stable across rebuilds, sessions and devices.

Implementation

static Color colorFor(BuildContext context, String name) {
  final scheme = Theme.of(context).colorScheme;
  final index = name.trim().toLowerCase().hashCode.abs() % 6;
  switch (index) {
    case 0:
      return scheme.primaryContainer;
    case 1:
      return scheme.secondaryContainer;
    case 2:
      return scheme.tertiaryContainer;
    case 3:
      return scheme.surfaceContainerHighest;
    case 4:
      return Color.alphaBlend(
        scheme.primary.withValues(alpha: 0.24),
        scheme.surfaceContainerHighest,
      );
    default:
      return Color.alphaBlend(
        scheme.tertiary.withValues(alpha: 0.24),
        scheme.surfaceContainerHighest,
      );
  }
}