Go to Settings > Accessibility > Text size to increase the weight, or search for "Adjust ClearType text" to improve font rendering and sharpness.
Tools like Make Chrome Text Black allow you to force all text on websites to be dark black and thicker. klea dark
For overall system text that is hard to read on Windows or mobile: Go to Settings > Accessibility > Text size
The quickest way to make text appear darker is to increase its "weight." Highlight the text and press Ctrl + B . macOS: Highlight the text and press Command + B . Result: klea dark 2. Change the Font Color klea dark