We observed some challenges for accurate color representation of Fall Colors photo images. Following is my own opinion and can well be different from yours.
Regarding the color, I believe there are many factors involved to represent accurate (intended color by the author) in the public audience’s monitor display.
Especially the image we are talking about is for Fall Colors which the color is the main subject. My approach is to make my image as accurate as possible yet pleasant and appealing. Auto White Balance in shaded scene tends to show up in bluish results in NIKON DSLR (I am not sure in CANON camera). Therefore I adjusted White Balance towards warmer (about 4900K) in my photo in this case. I increased Vibrance and bit of Saturation until the point where the color will not become flat (saturated and no fine variances), Once the color spread to the area in flat, I consider it over saturation. I would like to emphasize that this is my own judgement and other person’s judgement is good for him or her. There is no sense of good image or bad image assessment for such photographic artwork style. In this case, I sensed simply the original image (AWB) is too blue casted and I adjusted to warm. What I now am seeing in my monitor may not be the same as what now you are seeing in your monitor. That remains huge challenges for all digital photographers.
Below is my image with my final adjustment which uses less vibrant/saturation and warmer color temperature (4815K).
Below is my image with the adjustment as close as Mogi-san’s image and looks bluish and over color saturated in my eyes.
In terms of color accuracy of the web browser, personally, I’ve not experienced any differences between the browsers. Below is is comparison amongst LightRoom (before Export), My Website (through Safari), and Mac’s Preview (just open an exported JPEG file). You may not be able to see any differences amongst those. Preview is shown in Left Upper, My website (through Safari) is shown in Right Upper, and straight from LightRoom is shown in Right Lower segment. Left Lower images is from Mogi-san’s image (from his e-mail).
Since this is very important subject for us digital photographers, your input, comments, critiques are very welcome and will contribute to our team members.
Let’s keep shooting and sharing.