New in v1.7
Lens has always been using the Native Display profile to sample colors. This works great but caused problems when sampling colors from specific apps such as Safari, XCode, Preview etc. These apps use a different Color Profile, which resulted in the wrong color getting picked up.
Now in v1.7, you have the option to change your profile, so you always pick an accurate color.
The default is still set to Native Display, but you can also choose other profiles for specific apps.