Modal Ballad, very ECM, based on Cassandra Wilson's rendition of Blue in Green. Check it out, it's gorgeous.
Bass plays melodic line emphasizing 9ths. Consider it a 4/4 version of the Footprints bass line.
Sounds relaxed and gorgeous on a lot of slowly moving ballads: Blue in Green. If you use it on tunes like Misty, I fall in Love too easily, you might wanna reduce the number of chord changes: swap II-V's for a single V7 of Vsus.