The color is already covered in the first ruleset here

diff --git a/scss/mixins/_forms.scss b/scss/mixins/_forms.scss
index 698e7dc12d595588f7d9e54897f04adbb97729ca..e2bead1801c967798b9f50efa610a0a79bf92ab3 100644 (file)
--- a/scss/mixins/_forms.scss
+++ b/scss/mixins/_forms.scss
@@ -30,10 +30,6 @@
     border-color: $color;
     background-color: lighten($color, 40%);
   }
-  // Optional feedback icon
-  .form-control-feedback {
-    color: $color;
-  }
 }
 
 // Form control focus state