What are the colors of your flag?
For a majority of countries, the colours would be red, white and
blue, in various styles and forms.
Others commonly would include black, yellow and green besides
these main three. Some use of shades of purple, orange and pink is
rare but not unheard of.
That might depend on who the "YOU" is might be. Some accept the
simple Green Banner, some choose a variety of colors for their
National Symbols, Red and White is adequate for some Nations, but
the US has chosen white stars on a field of blue as well as 13
alternating bars of Red and White. Not all like it, some despise
it, and many have given their lives to honor it.