Digital vibrance on AMD and Intel
If you have searched this, you have probably already found a page explaining a slider that only exists on NVIDIA cards. Here is what an AMD or Intel machine actually gives you, and what it does not.
What the drivers give you
AMD's Adrenalin software has a Custom Color section with a saturation control. Open Adrenalin, go to Settings, then Display, and switch Custom Color on. There is a saturation slider under it.
Intel's Graphics Command Center has the equivalent under Display, then Color. It also has saturation, plus separate controls for each colour channel.
Both of these are real and both of them work. If a mild lift is all you wanted, you can stop reading here — you do not need anything else.
Where people get stuck
The driver control is one setting for the whole machine. It does not know which game you are in, so a level that looks right in a bright desert map is wrong in a dark interior, and you end up alt-tabbing to the control panel, dragging a slider, applying, and tabbing back — every time.
It also tends not to survive. A driver update, a resolution change or a monitor waking from sleep can put it back to default, and the first you know about it is that the picture looks flat again.
And on some laptop and hybrid-graphics setups the Custom Color section is missing entirely, because the panel is driven by the integrated chip while the game runs on the discrete one.
Doing it outside the driver
Colour can also be changed at the display layer — after the game has drawn its frame and before your monitor shows it. That is what PlexusX does: a colour matrix and a gamma ramp that belong to the app rather than to a driver feature, so the same controls behave the same way on NVIDIA, AMD and Intel.
Because it sits at that layer, nothing has to support it. There is no in-game setting to find and no game file is touched. Saturation runs to 300%, where 100% is your screen untouched, and every control returns to its default.
It can also switch by itself when a game starts, which is the part the driver control cannot do.
PlexusX runs on Windows 10 and 11. The download is free, and so is saturation with an account; the rest needs a plan.