Same color on both sides: the flag is the same color on both the front and back. So, no matter which side you look at, the color will always be identical.
Texture on front and color on back: if the front of the flag has a texture (a specific design or pattern), the back will not have the same texture. Instead, the back will be a solid color that matches the main color used in the design on the front.
Example:
If the front of the flag has a texture with various shades of blue, the back will be a single solid blue color, which is the dominant color of the texture.