What color is the diagonal cross on Scotland's flag?

The diagonal cross on Scotland’s flag is white.

Known as the Saltire or Saint Andrew’s Cross, the Scottish flag places a white X-shaped saltire on a blue field. In heraldic language, its design is blazoned “Azure, a saltire Argent,” with argent meaning silver or white.

The cross is associated with Saint Andrew, Scotland’s patron saint, who was traditionally believed to have been crucified on a diagonal cross. Scottish tradition connects the flag’s origin with a battle at Athelstaneford in 832, although the earliest documentary evidence is much later.

A 1385 Scottish ordinance required Scottish and French soldiers fighting together against England to display a white Saint Andrew’s Cross. The flag is often confused with the Union Jack, which also contains Scotland’s white saltire but combines it with the red cross of Saint Patrick and the white cross of Saint George. Blue shades vary, although Pantone 300 is the modern recommendation.