If there is one color that continues to drive me nuts in terms of metering, exposing and rendering correctly in post-processing - it is red. The digital camera, Canon 5D in my case (but by no means limited to that camera... all digital sensors apparently are afflicted with this "disease") red will easily - if not often - jump off the right side of the histogram scale. Determining "blown" highlights is tricky at best, totally evasive when shooting Raw (until after-the-fact when computer processing). The camera's LCD back-panel viewer is about worthless; Histogram set to reveal RGB colors only shows that a red-Jpeg is off the right side. The camera's blown-highlight flasher doesn't signal any warning for red... only if the luminescence reading jumps off the high end, and that's strictly with Jpegs.
How do we zero in on red? Or, is there any - in front of the lens - valid correction filter that would tone down red (and not affect green and blue)? Excessive sensitivity to red by the sensor appears as the underlying culprit. Canon engineers have avoided the subject for years.
Azalea flowers (attached) is but one example, sandhill cranes with their red heads, orange-pink pylon barrier race cones, day-glo fishing bobers are other examples.