diff --git a/core/src/themes/ionic.deprecation.scss b/core/src/themes/ionic.deprecation.scss
new file mode 100644
index 0000000000..3d6a7aba42
--- /dev/null
+++ b/core/src/themes/ionic.deprecation.scss
@@ -0,0 +1,5 @@
+$IONIC: false !default;
+
+@if not $IONIC {
+  @warn "[DEPRECATED] SCSS within ionic/core should not be imported. Next major release will remove all scss support.";
+}
diff --git a/core/src/themes/ionic.functions.color.scss b/core/src/themes/ionic.functions.color.scss
index 1d78bbe131..d82572d5bc 100644
--- a/core/src/themes/ionic.functions.color.scss
+++ b/core/src/themes/ionic.functions.color.scss
@@ -1,3 +1,5 @@
+@import "./ionic.deprecation";
+
 // Gets the active color's css variable from a variation. Alpha is optional.
 // --------------------------------------------------------------------------------------------
 // Example usage:
diff --git a/core/src/themes/ionic.functions.string.scss b/core/src/themes/ionic.functions.string.scss
index 8f1eaef5e7..e3637816a3 100644
--- a/core/src/themes/ionic.functions.string.scss
+++ b/core/src/themes/ionic.functions.string.scss
@@ -1,3 +1,4 @@
+@import "./ionic.deprecation";
 
 // String Utility Functions
 // --------------------------------------------------------------------------------
diff --git a/core/src/themes/ionic.mixins.scss b/core/src/themes/ionic.mixins.scss
index 6e89e8d295..6fe25be231 100644
--- a/core/src/themes/ionic.mixins.scss
+++ b/core/src/themes/ionic.mixins.scss
@@ -1,3 +1,4 @@
+@import "./ionic.deprecation";
 
 @mixin input-cover() {
   @include position(0, null, null, 0);
diff --git a/core/src/themes/ionic.skip-warns.scss b/core/src/themes/ionic.skip-warns.scss
new file mode 100644
index 0000000000..921384c5c3
--- /dev/null
+++ b/core/src/themes/ionic.skip-warns.scss
@@ -0,0 +1 @@
+$IONIC: true;
diff --git a/core/src/themes/ionic.theme.default.scss b/core/src/themes/ionic.theme.default.scss
index 0e68c133e5..b4ddb24685 100644
--- a/core/src/themes/ionic.theme.default.scss
+++ b/core/src/themes/ionic.theme.default.scss
@@ -1,3 +1,5 @@
+@import "./ionic.deprecation";
+
 // Ionic Theme
 // -------------------------------------------------------------------------------------------
 // This file contains the theme variables shared
diff --git a/core/stencil.config.ts b/core/stencil.config.ts
index 8ecffa57c2..d926aa87fa 100644
--- a/core/stencil.config.ts
+++ b/core/stencil.config.ts
@@ -64,7 +64,9 @@ export const config: Config = {
     ]},
   ],
   plugins: [
-    sass()
+    sass({
+      injectGlobalPaths: ['src/themes/ionic.skip-warns.scss']
+    })
   ],
   outputTargets: [
     {