[Editor] Handle correctly colors when saving a document in HCM

- for example in Dusk theme (Windows 11), black appears to be white, so
  the user will draw something in white. But if they want to print or
  save the used color must be black.
- fix a bug with the color input which only accepts hex string colors;
- adjust outline color of the selected/hovered editors in HCM.

web/annotation_editor_layer_builder.css

@@ -20,6 +20,13 @@
   --freetext-padding: 2px;
 }
 
+@media (forced-colors: active) {
+  :root {
+    --focus-outline: solid 3px ButtonText;
+    --hover-outline: dashed 3px ButtonText;
+  }
+}
+
 [data-editor-rotation="90"] {
   transform: rotate(90deg);
 }