The Confederate battle flag, usally well-known through its special blue saltire in opposition t a purple box

https://ericksigh824.birchreport.com/posts/buying-guide-what-to-look-for-in-quality-civil-war-flags

The Confederate war flag, repeatedly recognised by using its uncommon blue saltire opposed to a red discipline, was a permanent image of Southern pleasure and heritage, in spite of its controversial connotations.