Originally Posted by: SnowRoseHey guys, I am still a bit confused. So say the song is written in 'D Major'. Which Blues scale would fit in that?

It depends on precisely which chords you're using. If we're just looking at D Major as a key generally - you could use a D major blues scale (major pentatonic with the added b5), or you could use B minor blues (minor pentatonic with added b5) as it's the relative minor. You might also consider E Dorian for a bluesy feel... You could look at any mode of D Major to be fair, adding the flat fifths.

The 5 pentatonic shapes (CAGED) with the flattened fifths would give you a fair bit of scope across the neck straight away...