Boeing 787-9 Dreamliner (C-FGEO)

That's de-icing fluid Cade. There's guys on Flightaware that can tell you exactly what kind, but I think this is the heavy duty stuff!

The vast majority of deicing around the world is done with two fluid types: Type I and Type IV, both of which primarily consist of propylene glycol. Type I is the orange or reddish fluid used to actively deice the aircraft by melting and knocking off contamination. Heated up to 82 degrees Celsius (180 degrees Fahrenheit) and mixed with water, the chemical properties of the glycol lower the freezing point of water, while the heat and high pressure can melt and remove contamination. Type IV, the bright green fluid you’ll see aircraft covered in while taxiing, is often referred to as anti-icing fluid. It is not mixed with water and is much thicker than Type I. Type IV sticks to the aircraft and is used during active snowfall or precipitation to prevent accumulation of additional ice or snow. It can provide a holdover time of up to 45 minutes, allowing aircraft to depart safely after an extended taxi or ground delay. (Excerpt taken from FR24 Newsletter).

Hopefully when i put this shot up flightaware does not take it off because it thinks it is copyright