Color picker - Error in numbers

[gennadiy]

Noticed when working with a gray image:
1. Create an image with 20% gray.
2. We take on it the value of the pipette. (20% not equal 18%).

Untitled.jpg

[Martin Huber]

I have minor differences on Windows (it works fine on macOS), but not anywhere near your values. I will check that.

What gray profile are you using?

Martin

[gennadiy]

This happens if:
Activate Color Management = OFF

At the same time, the difference in numbers depends on the established Gray profile on the Standard tab.