Details

nine equal horizontal stripes of blue alternating with white; a blue square bearing a white cross appears in the upper hoist-side corner; the cross symbolizes Greek Orthodoxy, the established religion of the country; there is no agreed upon meaning for the nine stripes or for the colors

note: Greek legislation states that the flag colors are cyan and white, but cyan can mean "blue" in Greek, so the exact shade of blue has never been set and has varied from a light to a dark blue over time; in general, the hue of blue normally encountered is a form of azure