Hello, this bug is still in every unity version that i’ve have.
I download unity 2017.3f.0f3 and icon in project still get darken with linear color space activated.
Actual bugreport below by this links
Hi! Not clear on why the case you linked says it is not reproducible, but a bug like this has been fixed for 2018.1 and the beta should be available soon, so please check it out there