Howdy Bernds, Sonoran Russell Crowe here.
I was reading my monitor's manual and I found this DisplayPort's function called: "Display Data Channel (DDC) / Command Interface (CI)" which allows me to remove the fucking damn blue light from my monitor THROUGOUT HARDWARE, THAT IS RIGHT BERND, HARDWARE SOLUTION WHICH DOES NOT ENVOLVE GETTING A NEW PAIR OF GLASSES. It looks like both of my cheap ass DELL E2220H does support it, so I checked Dell's support website and they do have a software to use said function but for Windows, so I did search about it at Arch's wiki and we have a binary for that and also it is... Qt based, that is right, no GTK bullshit but Qt.
Thanks for nothing useles Bernds. I hope any mofo reading this with a DisplayPort monitor finds this useful... Because blue fucking light is the damn worst ever. Blue light makes you more stupid, blind and autistic.
ArchLinux has a package to use said function called: "ddcutil" and its website is: http://www.ddcutil.com/ which is avaiable on other distros, like Fedora or any other RPM based too —give it a try if you use DisplayPort, ukrabernd.
What it is that? you may ask: "DDC essentially allows the monitor to inform the computer about it’s supported display modes. But even more important, a display data channel allows the user to oversee and change monitor features such as the brightness, contrast and color palette directly from their computer" [Source: https://appuals.com/what-is-ddc-ci-and-how-to-use-it/]
I am a man of commitment: I will read, study and research until I reach a damn solution that fulfill my necesities. Man up, Bernd. Be like me and stop being a sassy weak ass dude. Man the fuck up dude, I do not even know you and the fact that you may be reading me right now makes me SICK.