diff --git a/src/lib/checkbox/_checkbox-theme.scss b/src/lib/checkbox/_checkbox-theme.scss
index a27a48e7153f..fa7ad8bc036d 100644
--- a/src/lib/checkbox/_checkbox-theme.scss
+++ b/src/lib/checkbox/_checkbox-theme.scss
@@ -61,7 +61,8 @@
   }
 
   .mat-checkbox-disabled {
-    &.mat-checkbox-checked:not(.mat-checkbox-indeterminate) {
+    &.mat-checkbox-checked,
+    &.mat-checkbox-indeterminate {
       .mat-checkbox-background {
         background-color: $disabled-color;
       }
diff --git a/src/lib/checkbox/checkbox.scss b/src/lib/checkbox/checkbox.scss
index 15e625cf80de..e650352f52cc 100644
--- a/src/lib/checkbox/checkbox.scss
+++ b/src/lib/checkbox/checkbox.scss
@@ -360,12 +360,6 @@ $_mat-checkbox-mark-stroke-size: 2 / 15 * $mat-checkbox-size !default;
     opacity: 1;
     transform: scaleX(1) rotate(0deg);
   }
-
-  &.mat-checkbox-disabled {
-    .mat-checkbox-inner-container {
-      opacity: 0.5;
-    }
-  }
 }
 
 
diff --git a/src/lib/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss b/src/lib/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
index eb38e33a8f12..871fadce6f6b 100644
--- a/src/lib/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
+++ b/src/lib/core/selection/pseudo-checkbox/_pseudo-checkbox-theme.scss
@@ -43,7 +43,8 @@
     background: mat-color(map-get($theme, warn));
   }
 
-  .mat-pseudo-checkbox-checked {
+  .mat-pseudo-checkbox-checked,
+  .mat-pseudo-checkbox-indeterminate {
     &.mat-pseudo-checkbox-disabled {
       background: $disabled-color;
     }
diff --git a/src/lib/core/selection/pseudo-checkbox/pseudo-checkbox.scss b/src/lib/core/selection/pseudo-checkbox/pseudo-checkbox.scss
index cbb6e725e6a0..fa9ead2379e0 100644
--- a/src/lib/core/selection/pseudo-checkbox/pseudo-checkbox.scss
+++ b/src/lib/core/selection/pseudo-checkbox/pseudo-checkbox.scss
@@ -45,10 +45,6 @@ $_mat-pseudo-checkmark-size: $mat-checkbox-size - (2 * $_mat-pseudo-checkbox-pad
 
 .mat-pseudo-checkbox-disabled {
   cursor: default;
-
-  &.mat-pseudo-checkbox-indeterminate {
-    opacity: 0.5;
-  }
 }
 
 .mat-pseudo-checkbox-indeterminate::after {