modules/controls/src/main/resources/com/sun/javafx/scene/control/skin/modena/modena.css

@@ -2077,11 +2077,14 @@
 .custom-color-dialog .controls-pane #settings-pane .settings-label {
     -fx-min-width: 5.75em;
 }
 
 .custom-color-dialog .controls-pane #settings-pane .settings-unit {
-    -fx-max-width: 1em;
+    -fx-max-width: 1.5em;
+    -fx-min-width: 1.5em;
+    -fx-pref-width: 1.5em;
+    /* -fx-max-width: 1em; */
 }
 
 .custom-color-dialog .controls-pane #settings-pane .slider {
     -fx-pref-width: 8.25em;
 }