Documentation fixes

README.md

@@ -2,6 +2,8 @@
 
 [![PyPI Downloads][pypi-dl-image]][pypi-dl-link]
 [![PyPI Version][pypi-v-image]][pypi-v-link]
+[![Release Status][release-image]][release-link]
+[![License][license-image]][license-link]
 
 A material design theme for MkDocs.
 
@@ -25,3 +27,7 @@ For detailed installation instructions and a demo, visit [squidfunk.github.io/mk
 [pypi-dl-link]: https://pypi.python.org/pypi/mkdocs-material
 [pypi-v-image]: https://img.shields.io/pypi/v/mkdocs-material.png
 [pypi-v-link]: https://pypi.python.org/pypi/mkdocs-material
+[release-image]: https://img.shields.io/github/release/squidfunk/mkdocs-material.svg
+[release-link]: https://github.com/squidfunk/mkdocs-material/releases/latest
+[license-image]: https://img.shields.io/github/license/squidfunk/mkdocs-material.svg
+[license-link]: https://github.com/squidfunk/mkdocs-material/blob/master/LICENSE
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docs/customization.md

@@ -68,6 +68,10 @@ $primary: $red-400;
 $accent:  $teal-a700;
 ```
 
+The color variables are defined by the SASS library [quantum-colors][] and
+resemble all the colors contained in the material design palette.
+[This page][material-colors] offers a really good overview of the palette.
+
 ### Building
 
 When you finished making your changes, you can build the theme by invoking:
@@ -84,3 +88,5 @@ variable pointing to the aforementioned directory in your original
 
 [MkDocs]: http://www.mkdocs.org
 [MkDocs documentation]: http://www.mkdocs.org/user-guide/styling-your-docs/#customising-a-theme
+[quantum-colors]: https://github.com/nkpfstr/quantum-colors
+[material-colors]: http://www.materialui.co/colors
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