Medical helicopter pilot reported a NMAC with a powered parachute enroute to destination.

Narrative

Departure from base 3 NM east of ZZZ; made a CTAF call to area traffic (Aircraft X 3 east of ZZZ departure to the NE; climbing to 1100); then turned on course to hospital and climbed to 1100 MSL. No other calls were heard on CTAF and do not normally monitor guard; so unsure if any calls were made there. Sun had just set to the left aft of the flight path so long shadows across the ground made conditions difficult for seeing lower aircraft; which there wouldn't normally be at 1100 MSL (700 AGL.) Just outside of ZZZ Class E encountered a powered parachute (backpack paramotor) (PPG) with a multicolored (color 1/color 2/color 3 with a symbol across the top) canopy. Somehow the canopy blended in to the ground colors/shadows and with no direct sun to illuminate the canopy; it was hard to see. I finally saw it as it crossed into my right chin bubble approximately 150 feet below as our paths converged; with the PPG approaching from my 10 o'clock (obscured by instrument cluster and door and window frame from the right seat.) After crossing under me the PPG continued to the SSE; with no apparent change in course. I have no idea if the pilot saw our aircraft; even though we fly with position; anti collision lights; and wig/wag landing lights on.