In KDE, I use the "Layout based switcher" alt-tab task switcher, with the "Informative" layout. All the layouts that display both icons and text have the icons for all but the currently selected task grayed out.
Is there any way to have all icons displayed in color?
As the purpose of the task switcher is to switch to another task, it really makes no sense to have the icons for those tasks grayed out. All it does is to make it take longer to find the right icon as they look less familiar and much more similar to each other.