What key is this progression in? Childish Gambino-3005

[krazyk]

I've really been listening and studying a lot of Childish Gambino stuff. Some of the progressions he uses sound simple but full. I found the chords for "3005"

Dbm7
Dmaj7
Gbm7

I'm trying to figure out what type of progression this is (example: i-iv-V) and what key.

Link to a piano tutorial I'm studying for the song



Piano Lesson | Childish Gambino | 3005 - YouTube

 

[doesntmatter]

Wouldnt it just be C# - D - Gb, or 4, 5, 1 ? seems... not that hard. then just check which scale those notes would fall in. I'm not sure. I would the bandcoach chord- note key tool

edit: looks like F#m using harmonic minor would give V - bVI - 1, but that would make your 1 to be Gbm7... not sure, i'm a noob

 

[Pumpthrust]

i-v-VI in the key of F# minor

Db-7=C#-7 (v)
Dmaj7 (VI)
Gb-7=F#-7 (i)

He isn't using the harmonic minor since the Db is just a vanilla minor chord. If he was borrowing from the harmonic minor scale, the Db would be dominant (Db7).

 

[Terry Cano]

The chord LH D RH Gb A Db
Is D Maj 7
The correct spelling is F# not Gb and C$ not Db
the notes are D F# A C# 1 3 5 7 notes of the D Maj scale