web page values are a very light gray and difficult to read

[DG12]

The choice of gray is very difficult to read. What's wrong with BLACK ?

from Innovation Studio, Carnegie Museums of Pittsburgh
...The general rule for Level AA contrast is that normal text needs a ratio of 4.5:1 between the foreground and background colours, ...
TL;DR simplyAccessible/pitfalls-colour-contrast

I tried to run a color checker but due to the way the page is generated I couldn't get it to work.

Thank you