[a_t48]

Not OP, but at default zoom level, the text is too thin - most of the pixels aren't actually black - they are subpixels smeared across two columns.

[pjc50]

Yup - for me, each ascender of an "h" is a line of red pixels next to a line of blue, no actual black at any point.

Removing the unnecessary font-weight CSS makes it better. Personally I also find it more readable if I remove the font specification and let it fall back to Serif, and it also takes up less vertical space, but that's a matter of personal taste. Not tried it on mobile.

[chrisseaton]

> Yup - for me, each ascender of an "h" is a line of red pixels next to a line of blue, no actual black at any point.

Each of your pixels is made of a tiny red, green, and blue pixels. The 'black pixel' is the gap between the red and blue sub-pixels (the green being off is black.)