fix border and text colors

src/client/styles/scss/theme/_reboot-bootstrap-theme-colors.scss

@@ -4,6 +4,16 @@ $theme-colors: map-merge($theme-colors, $colors);
   @include bg-variant('.bg-#{$color}', $value);
 }
 
+@each $color, $value in $theme-colors {
+  .border-#{$color} {
+    border-color: $value !important;
+  }
+}
+
+@each $color, $value in $theme-colors {
+  @include text-emphasis-variant('.text-#{$color}', $value, true);
+}
+
 @each $color, $value in $theme-colors {
   .btn-#{$color} {
     @include button-variant($value, $value);

src/client/styles/scss/theme/default.scss

@@ -163,8 +163,8 @@ html[dark] {
   $color-editor-icons: $color-global;
 
   // Border colors
-  $border-color-theme: black;
-  $bordercolor-inline-code: #4d4d4d; // optional
+  $border-color-theme: #444;
+  $bordercolor-inline-code: #666; // optional
 
   // Dropdown colors
   $bgcolor-dropdown-link-active: $primary;