Fixes #14107: Lighten placeholder text

dist/css/bootstrap.css

@@ -2368,14 +2368,14 @@ output {
           box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
 }
 .form-control::-moz-placeholder {
-  color: #777;
+  color: #999;
   opacity: 1;
 }
 .form-control:-ms-input-placeholder {
-  color: #777;
+  color: #999;
 }
 .form-control::-webkit-input-placeholder {
-  color: #777;
+  color: #999;
 }
 .form-control[disabled],
 .form-control[readonly],

docs/dist/css/bootstrap.css

@@ -2368,14 +2368,14 @@ output {
           box-shadow: inset 0 1px 1px rgba(0,0,0,.075), 0 0 8px rgba(102, 175, 233, .6);
 }
 .form-control::-moz-placeholder {
-  color: #777;
+  color: #999;
   opacity: 1;
 }
 .form-control:-ms-input-placeholder {
-  color: #777;
+  color: #999;
 }
 .form-control::-webkit-input-placeholder {
-  color: #777;
+  color: #999;
 }
 .form-control[disabled],
 .form-control[readonly],

less/variables.less

@@ -188,7 +188,7 @@
 @input-border-focus:             #66afe9;
 
 //** Placeholder text color
-@input-color-placeholder:        @gray-light;
+@input-color-placeholder:        #999;
 
 //** Default `.form-control` height
 @input-height-base:              (@line-height-computed + (@padding-base-vertical * 2) + 2);