they're standard yellow but if you flush a whole litre you will flush the old fluid out. start with the back right side first and keep an eye on the reservoir. when it gets down top out with new fluid. repeat one more time and you should be good. same thing with other three corners. don't let air to get in the line otherwise you will be going through more than a litre to flush out the air
"I would quote everything pixelblue said, but you've already read it. Take it from someone who's put the 1 through its paces"