Disable color debug log by default

Change-Id: I632c59e885835da6c8428abad5ef1d33d8406abb
Related: PROD-28528(PROD:28528)
(cherry picked from commit 1476bf23d725de8ae5257ea9f87e94d01d0ab536)
diff --git a/README.rst b/README.rst
index 863a0f6..bc7e03b 100644
--- a/README.rst
+++ b/README.rst
@@ -175,6 +175,16 @@
             - 25 at 23:45
             - hourly
 
+Enable color for debug logs
+
+.. code-block:: yaml
+
+    backupninja:
+      client:
+        enabled: true
+        log:
+          color: true
+
 If multiple "when" options are present, then they all apply. If two configurations files are scheduled to run in the same hour, then we fall back on the alphabetical ordering specified above.