If you want to do it yourself, you'd get a colorimeter or spectrometer and then software that lets you use them to adjust your screen, like ArgyllCMS and Dispca

If you want to do it yourself, you'd get a colorimeter or spectrometer and then software that lets you use them to adjust your screen, like ArgyllCMS and DispcalGUI: https://displaycal.net/ https://displaycal.net/ There's a list of hardware supported by Displaycal here: https://displaycal.net/#instruments https://displaycal.net/#instruments