Wikipedia
Khepresh
The Khepresh was an ancient Egyptian royal headdress. It is also known as the blue crown or war crown. New Kingdom pharaohs are often shown wearing it in battle, but it was also frequently worn in ceremonies. It used to be called a war crown by many, but modern historians refrain from defining it thus.
The Khepresh was made from cloth or leather stained blue and was covered with small yellow sun discs. Like many other royal crowns an uraeus was fastened to its front.