Use a bunch of regex magic to add CSS variables

README.md

@@ -2,8 +2,10 @@
 
 Additional color classes for Bootstrap 3.  Based on the [Material Design palette](https://material.io/guidelines/style/color.html#color-color-palette).
 
+This branch uses CSS variables instead of inline colors, for easy modification with [any modern browser](http://caniuse.com/#feat=css-variables).
+
 ## Notes:
 * Link this CSS after you link to Bootstrap.css.
 * Use the included color classes instead of .btn-primary, .alert-danger, etc.
 * Navbars need both the .navbar-inverse (or .navbar-default for lighter colors, try both and see which works for you) and .navbar-[color] classes to appear properly.
-* We recommend using [Bootswatch Paper](http://bootswatch.com/paper/) (a material design Bootstrap theme) with this stylesheet.  We don't test or support it on other themes, actually.
+* We recommend using [Bootswatch Paper](http://bootswatch.com/paper/) (a material design Bootstrap theme) with this stylesheet.  We don't test or support it on other themes, actually.