use css variable for dialog background

sathishlxg · Zsailer · commit cdf71f06653f · 2022-11-08T13:16:59.000-08:00
diff --git a/style/publish_notebook.css b/style/publish_notebook.css
@@ -91,8 +91,8 @@
 }
 
 .jp-dialog-validation-error .has-unsaved-changes {
-  background: white;
   padding: 20px;
+  background: var(--jp-layout-color2);
 }
 
 .dialog-header {

Original file line number	Diff line number	Diff line change
`@@ -91,8 +91,8 @@`
`91`	`91`	`}`
`92`	`92`
`93`	`93`	`.jp-dialog-validation-error .has-unsaved-changes {`
`94`		`- background: white;`
`95`	`94`	`padding: 20px;`
	`95`	`+ background: var(--jp-layout-color2);`
`96`	`96`	`}`
`97`	`97`
`98`	`98`	`.dialog-header {`