key signature
D♯ minor
D♯1E♯2F♯3G♯4A♯5B6C♯7
6 sharps, written F♯ C♯ G♯ D♯ A♯ E♯
The chords that live in it
D♯mdegree 1 · minorE♯dimdegree 2 · diminishedF♯degree 3 · majorG♯mdegree 4 · minorA♯mdegree 5 · minorBdegree 6 · majorC♯degree 7 · major
Built by stacking thirds inside the scale and asking what quality comes out, rather than from a table of roman numerals.
What is true of it
D♯ minor has 6 sharps.
They are written in this order, always: F♯ C♯ G♯ D♯ A♯ E♯.
Its notes are D♯, E♯, F♯, G♯, A♯, B and C♯.
Relative: F♯ major has the same 6 sharps. Parallel: D♯ major has 9 sharps, which is why changing mode changes the signature by three.
Every key
C♭ majorG♭ majorD♭ majorA♭ majorE♭ majorB♭ majorF majorC majorG majorD majorA majorE majorB majorF♯ majorC♯ majorA♭ minorE♭ minorB♭ minorF minorC minorG minorD minorA minorE minorB minorF♯ minorC♯ minorG♯ minorA♯ minor