Watch the Changing Colors online guitar lesson by TrueFire from Play Bass Guitar 4: Groove Vocabulary
Changing Colors - Groove 45 is a video guitar lesson presented by Andrew Ford and is sourced from 50 R&B Bass Grooves You MUST Know.
The song that this bass line is based on is not typically classified as R&B since it was an instrumental and done by a jazz artist, but due to the popularity of the bass line with R&B and jazz audiences, as well as its characterstics it could easily be called R&B funk. The objective here was to create a hypnotic-type line over two chords going from ii minor 7 to V dominant 7 that grooved. The line, just like the original it is based on, emulates a synth bass so try and adjust your approach somewhat to reflect the characteristics of a synthesizer, ie. a bit more full, lines and note more connected. This one also begins with a pick up on the & of 3.