It would appear these are not valid on iOS ... or perhaps Flutter stopped understanding them in the past 6 months.
flutter: ══╡ EXCEPTION CAUGHT BY WIDGETS LIBRARY ╞═══════════════════════════════════════════════════════════
flutter: The following FormatException was thrown building OverlayInspirationCard(dirty):
flutter: Invalid radix-10 number (at character 1)
flutter: white
flutter: ^
flutter:
flutter: The relevant error-causing widget was:
flutter: OverlayInspirationCard
flutter: file:///Users/steven/work/pariyatti/mobile-app/lib/ui/screens/today/TodayScreen.dart:52:18
flutter:
flutter: When the exception was thrown, this was the stack:
flutter: #0 int._throwFormatException (dart:core-patch/integers_patch.dart:131:5)
flutter: #1 int._parseRadix (dart:core-patch/integers_patch.dart:142:16)
flutter: #2 int._parse (dart:core-patch/integers_patch.dart:100:12)
flutter: #3 int.parse (dart:core-patch/integers_patch.dart:63:12)
flutter: #4 OverlayInspirationCard.build (package:patta/ui/common_widgets/cards/OverlayInspirationCard.dart:136:50)
< the rest of the stack trace is elided >
It would appear these are not valid on iOS ... or perhaps Flutter stopped understanding them in the past 6 months.