A C# Major Chord is a three-note chord that consists of the notes C#, E#, and G#. It is built on the root note C# and follows the major chord formula of a major third and a perfect fifth. In this case, the interval between C# and E# is a major third, while the interval between C# and G# is a perfect fifth. This chord is commonly used in various music genres, including pop, rock, and classical. It can be played on different instruments, such as the piano or guitar, and is often used to create a bright and uplifting sound in compositions.