Argentina Calling Code Flag 54

The international calling code flag for Argentina is cyan/sky blue and green for the background.  The phones are coloured as pink and yellow for the contrast indicators.  The field colours are coded to numbers which are further coded to the order of the rainbow.  Cyan is 5 and green is 4.  Just remember the order of the rainbow.

https://www.movistar.com/es/
https://www.movistar.com/es/

Germany Calling Code Flag 49

Germany's international calling code is 49.  In this flag the numbers are represented by the green and pink triangular fields.  Yellow is the assigned contrast indicator for green, while blue is the assigned contrast indicator for pink.

The colour association is based upon colour metrics as calibrated to the spectrum.


https://www.telekom.de/start

Norway Calling Code Flag 47

You can have sound waves happen in Norway if you dial 47, which is international passcode to reach this majestic land.  The flag for Norway's international code is green and violet in the background.  The key to getting it is to see that the colours are ordered to the sequence of the official rainbow.  Colour number 4 is green, while colour number 7 is violet.  It just so happens that both contrast indicators are yellow.

Japanese Calling Code Flag 81

You need to dial 81 to reach Japan.  The assigned colours for 8 and 1 are black and red, respectively.  Red is the 1st colour of the rainbow so it represents the number one.  8 has been assigned black.  Additionally the contrast indicators are white, which both black and red have.  This makes the Japanese International Call Code Flag very harmonious.  Likewise it is good that red and white reflect the national colours of Japan.
https://www.nttdocomo.co.jp/

China Calling Code Flag 86

The international calling code number for China is 86.  Six is linked to dark blue/indigo while 8 is linked to black.  Funny thing is, in Yankee Restaurant Lingo, 86 means all out of a certain menu item.

http://www.chinaunicom.com/
http://www.chinaunicom.com/

Russia Calling Code Flag Number 7

Russia is the small club of nations to have a single digit for its calling code.  It is code 7 for international called to Russia.  The field is violet since the 7th colour of the rainbow is violet.  Likewise the yellow phone is the assigned contrast indicator.

Only Canada, USA, and Russia get single digit codes.   Although Russia may be #7, she get a private digit.  Canada & the USA have to share the same number: #1.

Although no Russian colours are apparent, if you mix red and blue, you get violet.
https://moskva.mts.ru/personal

US & Canada Calling Code Flag #1

The country phone code for Canada and United States is the same number — 1.  Thus there are two nations that are number 1.  Likewise both Canada and the US have red and white in their flags.  Here is one more flag that united these nations.

The red field is indicative of the number 1.  This is based upon the sequence of the rainbow, whereby red was given the first position by as directed by the cosmically-divine architecture. Orange is 2, and Yellow is 3 and so on.  Right now, this universe does not permit the any of the other colours to lead, besides red.  As far as we know, under natural conditions, red is first under Standard Temperature and Pressure.

The assigned contrast indicator for red is white, since there is only one number there is only one phone icon.  Other nations have 2 or 3 numbers, consequently their flags with have 2 or 3 phone icons.