If you want to go overboard, you would need to purchase a tool to check your
screen for colour definition. Essentially this is a camera and related
software that tests standardised colours against those produced by your
screen. Then you would need to store this screen profile on your computer.

After this in the viewing/editing software you would need to load the ICC
profile of the device used to take the image. Often 'average' profiles for
digital cameras can be found searching th Internet.

After a bit of this style of fiddling, you can begin to feel relatively
confident that you are seeing 'true' colour on pics you have taken in known
conditions.

Trouble is often you don't know how the image was produced in the first
place when it is not yours.

This lack of confidence in colour reproduction may help explain why many of
us have overstuffed fly boxes and countless variations of olive etc in our
fly tying kits.