Short answer: The panoramic images use a near-infrared filter rather than a red filter to create the red part of the image. As it happens, the blue color spot is particularly bright in the near-IR range (actually, brighter than it is in the blue range), though it's not bright in the red range. So when you image it in the near-IR range and then convert that data into the red portion of the image, it ends up looking pink.

Long answer: Here

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"Nobody understands quantum physics." -- Richard Feynman

"So, does quantum physics predict circular orbits for electrons?" -- Student in my Intro to Quantum class

Showing that Feynman was especially correct about some individuals.