[Math] UInt -> Color might not behave as users might expect

Release Type: GitHub

Version: Latest

Platform(s): Any

Describe the bug
The format for string and ints to convert from and to colors are different from what most users might expect and what summaries for those functions implies:

var c = Color.FromRgba(ColorExtensions.StringToRgba("#FF119900"));
System.Console.WriteLine( $"R:{c.R:X} G:{c.G:X} B:{c.B:X} A:{c.A:X}" );
// Prints R:11 G:99 B:00 A:FF

c = Color.FromRgba(0xFF119900);
System.Console.WriteLine( $"R:{c.R:X} G:{c.G:X} B:{c.B:X} A:{c.A:X}" );
// Prints R:00 G:99 B:11 A:FF

To Reproduce
See above

Expected behavior
Mention that input string must be in ARGB format or change implementation to parse as an RGBA strings.
Should Color.FromRgba be changed to handle like most people would expect from an hex literal?
Try to avoid breaking changes if possible.

Additional context
#746
#693

Start by inspecting the Color.FromRgba and ColorExtensions.StringToRgba entry points, then compare their handling of the two examples in the issue. Review related issues #746 and #693 before deciding whether documentation or implementation should change; done means the formats are consistent or explicitly documented without unintended breaking changes.