If you want to make a good texture my proposition is: do it like the painters of old: go out into nature and paint from sight.

But use different computer screen types.

Do it for different weather and lighting conditions at different seasons and at different day times.


Three reasons for this:
A photo will always distort colours. It is inevitable. Even the best will have an optical system that changes some parameters slightly so that in the end the result will differ from reality. With digital cameras the sensor will add to this. For analogue cameras it is the film material that will change the colours.

Each computer screen type has its own colour scheme that alters the overal colour tone. So the same photo will look different on different computer screens. Some better computer screens will allow you to select a warm (redish) or cold (blueish) tone or some more advanced settings. But whatever you design on your screen will look different on the screen of another guy.

Memory is treacherous and shifts the perception of things - even the colours.
Also colour perception is strongly influenced by comparison the eye or brain does with other colours. So an item that you percieve as pure white will appear to you to be more yellowish or more greyish or more whatev' when you hold close to it something that is in fact whiter.