Update "README.rst" file.

Author: KelSolaar

README.rst

@@ -45,6 +45,17 @@ Code of Conduct
 The *Code of Conduct*, adapted from the `Contributor Covenant 1.4 <https://www.contributor-covenant.org/version/1/4/code-of-conduct.html>`__,
 is available on the `Code of Conduct <https://www.colour-science.org/code-of-conduct/>`__ page.
 
+Contact & Social
+----------------
+
+The *Colour Developers* can be reached via different means:
+
+- `Email <mailto:colour-developers@colour-science.org>`__
+- `Discourse <https://colour-science.discourse.group/>`__
+- `Facebook <https://www.facebook.com/python.colour.science>`__
+- `Gitter <https://gitter.im/colour-science/colour>`__
+- `Twitter <https://twitter.com/colour_science>`__
+
 About
 -----