Because the gamut of color that can be reproduced with ink is smaller than what we see with our eyes, any color that cannot be printed is referred to as .

out of gamut color

Explanation:

In simple words, The term 'out of control' relates to a collection of colors that cannot be replicated in the space used for industrial publishing inside the CMYK color space. Visualization technology is configured to run during the revision process of photos in the RGB color space. A certain full subset of colors is in color reproduction, like computer animation as well as photographs, the gamut, or color gamut,

your word would be isle.

isle is an island or peninsula especially a small one.

if you add the letter "a" you get aisle, which is a passage between 2 rows of something like chairs, shelves, or something else.