« on: Today at 02:33:58 AM »
On the computer monitor you only know what you are being shown if you use an external meter (and that is subjective)
Are you saying there is reason to doubt the colour calibration tools commonly available? Otherwise I've already covered the topics you describe.
Yes and no, different calibration tools will return different absolute values, but the point is not as esoteric as that. If the flower was in sunlight it was being illuminated by anything between 2,500K-8,000K, if it was strobe lit it will be around 5,500K, most people calibrate their screens to 6,500K, the screen will have a different colour to the flower under both flash and most times of the day.
So your point is that the colour of an object will change depending on circumstances. This has nothing to do with the objectivity of colour (whatever colour you see at any given moment can be measured).