In books, largely pages are printed in black and white. This could help make you focus on the text you're reading.

The OS of the computer I'm using ... is Windows 10. Is there anything like a function that makes the screen displayed in black and white? If there is a function like that, by reducing the colors on display, it might help my reading English webpages in terms of facilitation of concentration on text when I read it over a long time ...

I thought thus and I've found the grayscale option in the item of "color filter" in settings.

Now having checked the box in the control panel for settings, I can alternate the screen color between the original and the grayscale with the shortcut key Win + Ctrl + C.

Will this help my reading English on the screen? It would turn out as I try it for some time from now on.