The order of the bands helps narrow down a blue and white flag. Guatemala runs its bands vertically. On Argentina’s flag, the white band runs across the middle and carries a gold sun.
On Greece’s flag, look for a cross in the upper corner and additional stripes. Count the stars to distinguish Honduras from Israel: five on Honduras, one on Israel. The central triangles of El Salvador and Nicaragua are surrounded by lettering, so the country name is the quickest clue when the flag is large enough to read.
The strips below compare the blue and white swatches. Open each country’s palette for HEX codes and additional colors.

Compare star arrangements in blue and white flags with stars.