diff --git a/scss/_custom.scss b/scss/_custom.scss
new file mode 100644
index 0000000000..6871992aa7
--- /dev/null
+++ b/scss/_custom.scss
@@ -0,0 +1,4 @@
+// Custom Overrides
+//
+// Copy settings from `_variables.scss` to this file to override
+// the Bootstrap defaults without modifying key, versioned files.
diff --git a/scss/bootstrap.scss b/scss/bootstrap.scss
index e9300f54dc..8f7e90ea2f 100644
--- a/scss/bootstrap.scss
+++ b/scss/bootstrap.scss
@@ -6,6 +6,7 @@
 
 // Core variables and mixins
 @import "variables";
+@import "custom";
 @import "mixins";
 
 // Reset and dependencies