I've noticed in the past that the Olympus sensor provides great colors, but it has always struggled to avoid being completely oversaturated and losing the details with this shade of pink/magenta. In this case I think it held up pretty well.
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E-P5 with PL 20mm at f/3.2, 1/250 sec, ISO 200.
Looking at each channel separately, reveals that the flower has almost no information in the green channel. Since the sensor uses two green detectors for every red and blue one, I suppose it makes sense that this shade would struggle with only having half the typical information to work with...