The Philadelphia flag looks blue and yellow to the naked eye, but there is deepness in hues. Having seen multiple city flags ...

When you look at the flags of Chad and Romania, they appear strikingly similar, almost identical in design and color. Both ...

Pierced by shrapnel and bullets, this flag now shows the liberation of a Ukrainian city or village from the Russian invaders. And so many blue-and-yellow flags fly mournfully at the graves of fallen ...

Flags often imitate or are influenced by other nations, creating “flag families.” For example, the Netherlands’ red, white and blue flag from the 1500s set a precedent.

New York Gov. Kathy Hochul announced that State landmarks to be lit blue and yellow and flags on State buildings to be flown at half-staff on Monday.