Mark Otto 4d7911a27b Add and document additional :root CSS variables
- Adds grayscale colors
- Adds root and body variables

Note that some Sass variables default to `null`, so as we generate and use the CSS variable, we'll be potentially adding some lines of code.
2021-08-03 17:06:06 -07:00
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2019-03-13 19:22:59 +02:00