Australia Calling Code Flag 61

By coincidence the Calling Code Flag for Australia just happens to have to official colours of the current Australian flag: red, white and blue.  With Calling Code Flags the background colours are linked to numbers, as set by the rainbow.  Red is 1 and indigo/dark blue is 6.  This is based upon the natural order of the rainbow at standard temperature, pressure, and conditions.  Red is always first!  Orange and yellow came close, but they can never seem to beat out red in the order of the rainbow.

The phones are white, which are the assigned contrast indicators.  Again it is a harmonious match for when people from up-over try to call people down-under with the code 61.

https://www.optus.com.au/
https://www.optus.com.au/