F♯ major or F-sharp major is a major scale based on F♯, consisting of the pitches F♯, G♯,A♯, B, C♯, D♯, and E♯. Its key signature has six sharps.^[1]

F♯ major

Relative key	D♯ minor
Parallel key	F♯ minor
Dominant key	C♯ major
Subdominant	B major
Enharmonic	G♭ major
Component pitches
F♯, G♯, A♯, B, C♯, D♯, E♯, F♯

See also: F major and G-flat major

Its relative minor is D♯ minor (or enharmonically E♭ minor). Its parallel minor isF♯ minor. Its enharmonic equivalent is G♭major. In writing music for transposing instruments in B-flat or E-flat, it is preferable to use a G-flat rather than an F-sharp key signature. If F-sharp major must absolutely be used, one should take care that B-flat wind instruments be notated in A-flat major, rather than G-sharp major (or G instruments used instead, giving a transposed key of B major), and D-flat instruments in F major instead of E-sharp major, in order to avoid double sharps in key signatures.

https://en.m.wikipedia.org/wiki/F-sharp_major