The original photo had a dark cobalt sky that might be caused by photographer error while playing with a new travel and street photography camera. I didn't like the effect (it might be one of the Canon Picture Styles playing havoc with the settings). I changed it to a B & W after trying to lower the saturation and tone in PS.
Yes, Alexey, it might. But, as I noted, the last photo was delivered out of the camera as a JPEG with the same settings as the cobalt blue photo. That's the mystery. The infamous Canon blue devil at work? There were four or five JPEGs from that series with the same dark cobalt blue sky. In any event, thanks for having a good eye. Now I need to shake the bugs out of this camera BEFORE the wife takes it on a vacation to Hawaii. Can you imagine the blue ocean photos she will return with? And thanks for following all of this with your attention.
But Shanhon, as I saw you are experienced photographer. Why do you have any doubts about your camera? The mathematics of any camera can not be compared with special PC or MAC software. I do not trust to my nikon d90 to makes a decision about colors in my shoots. I use only RAW format and aprocess them on PC. I think if you make the same decision, your oucean photos will be great. I hope it will help to you a bit of.