[partlysean]

The other commenters here are right about the importance of text contrast, but there is a consensus in typography that pure white on pure black contributes to eye strain and decreased stamina when reading. This is especially true for people with astigmatism who experience a glowing effect around the letters known as halation. While there is room here for both personal preference and accessibility needs for a true 21:1 contrast ratio, a better default would be to use a white on a dark gray background. Supporting a dark mode design is a lot harder than just inverting the colors, which this site appears to fall short on.