The First National Flag of the Confederacy featured a design equivalent to the Union flag however differed significantly in

https://landenfwmq676.alderbrief.com/posts/flags-of-valor-the-significance-of-civil-war-flags-in-american-history-4

The First National Flag of the Confederacy featured a design resembling the Union flag but differed radically in shade and symbolism, emphasizing Southern independence.