What are the national colours of Australia?

How many national colours are there?
Precisely there are officialy, and in the mind of people, generally: two.
Green and yellow ('gold'). Why?

These are the colours of the national flower : flower of acacia (called 'golden wattle').
These colours have been used since a long time. The Australia's cricket team , first, wore them in 1899 (cricket is popular in Australia as in may British-origine countries and even in the US, but it is called 'baseball'-joke  ^ ^ -)
But it has been made official just in 1984 by the proclamation of the Governor General, with the advice of the Prime Minister of that time, Bob Hawke.

Green and gold have been popularised by the athletes who represent proudly Australia!

Is this all?
No, in fact , no. I think there are other national colours for Australia. I would say in priority, blue.
Why blue? Because of the Blue Ensign! And I don't think a people's flag or a new flag is possible without blue.
I would add secondarily, but truly red and black. Red is the second colour of the Blue Ensign and then red and black are colours from the Aboriginal flag. But even more than this. Red of the desert, especially. Don't we call the desertic centre of Australia, the 'red centre'?