Darker and more introspective — the first minor key here.
See how all seven chords sit together, and hear what makes each degree do its job.
Open D Minor in the Studio →The key of D Minor contains Dm, Edim, F, Gm, Am, Bb, C. In Roman numerals that's i, ii°, III, iv, v, VI, VII — the tonic (Dm) is home, and the dominant (Am) creates the tension that resolves back to it.
The third degree of the scale is flattened — a half-step lower than in a major key. That single note is what your ear reads as melancholy, and it's why the tonic chord is Dm rather than D. Everything else about the key's machinery works exactly as it does in a major key.