What aspect of North Dakota does the color blue on the state flag most closely relate to?

The color blue on the North Dakota state flag most closely relates to the sky. This choice symbolizes the vast and open skies that are characteristic of North Dakota's landscape. The blue hue reflects a sense of tranquility and freedom, which is often associated with the expansive views of the sky in the state's rural areas.

While water resources, natural resources, and education are significant aspects of North Dakota, the direct connection to the color blue is most prominent in representing the sky. The flag's overall design aims to reflect the state's identity and values, with the blue representing the clear skies that residents and visitors frequently enjoy.