This is the first in a series of more modern sounding chord scales. This particular chord scale is a d major scale harmonized with a diatonic fourth and fifth below the top note.
I say diatonic because all the notes used belong to d ionian. Because of the tritone between the 3rd and 7th degrees there are discrepencies in the pattern of suspended (1,4,5) triads. These are found in the lowest voice of the chord. These types of chords sound very hip and keyboard-like due to their small intervallic width (distance between top and bootom note).
Also, remember that this chord scale has chord modes too. (this dmajor chord scale is also e dorian, g lydian etc.)