Dark blue seems to have been adopted as the colour of Scottish national sports teams as well, despite it not being the colour of the saltire.
Wales only have the red from the dragon, the majority colour in their flag.
Northern Ireland and England also don’t follow the colour of their flags.
Its the rest of the world which is out of line in terms of using their flag colours for their strip.
Apart from Germany, Italy, Holland, Australia, etc, etc.......