In Adobe Camera RAW, the Calibration panel is the last panel in the right sidebar. Of course, no manufacturer is rendering blue as orange or something, but there are differences in how a blue sky will look when shot with different cameras. This is a big part of why Canon and Nikon cameras (and Apple and Samsung smartphone cameras) all have a unique look, and it’s largely the reason that two people standing side-by-side but using different cameras will get slightly different looking RAW photos. Different camera manufacturers convert the digital signal into the colors in your image in slightly different ways. However, there’s no universal standard for what electrical charges equal what colors. And this is done for every single one of the millions of pixels in your image with the exact ratio of electrical charges determining which of the millions of possible colors it is. If only the red sub-pixel generates a charge, the pixel will be rendered as red if the red and blue sub-pixels generate a charge, it’ll be some kind of purple and if the red, blue, and green sub-pixels generate a charge, it’ll be a white or gray. The relative strengths of the current generated by the red, green, and blue light-detecting sub-pixels are what’s used to calculate what color and how bright any given pixel in your image should be. When light hits the camera sensor, it generates an electrical current that is converted into a digital signal. Digital cameras don’t see the world the same way as your eyes.
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