Code blocks have very low contrast

[isaacbrodsky]

For example, see https://loaders.gl/docs/developer-guide/polyfills

A contrast checking extension reads the following:

Color	Contrast
#C5C8C6	1.57
#B5BD68	1.88
#8ABEB7	1.94

I think the issue is the file modules/gatsby-theme-ocular/styles/markdown/b16-tomorrow-dark.css - per the name it's for a dark theme, but that's not what Ocular uses. Code blocks should either have a dark background to bring the contrast up or switch the code styling to a light theme.