F# major is a musical key that consists of six sharps in its key signature. The notes in the F# major scale are F#, G#, A#, B, C#, D#, and E#. This key is often associated with a bright and uplifting sound, making it popular in various musical genres, including classical, jazz, and pop. In terms of chords, the primary chords in F# major are F# major, B major, and C# major. The relative minor key is D# minor, which shares the same key signature. Musicians often use F# major to create a sense of resolution and harmony in their compositions.