how to recognize if images have balanced colors?

[pure]

hi

how is it possible to say if images have neutral balanced colors if there is no neutral grey area in the picture?

i am sorry, i cant post pics here as they are too much and too different.
i am working on interior/architectural images and also Holiday/lifestyle images in the moment and i have no color references... they ve been scanned to ISO cmyk

i would like to know how you see/state if an image has too much green or yellow for example, regarding any hint or trick you use? sometimes i see it sometimes i cant.

thanks