Added CSS --border-color for better styling

dev/Styles/Admin/Config.less

@@ -5,4 +5,8 @@
 	em {
 		display: block;
 	}
+
+	th {
+		background: rgba(128,128,128,0.3);
+	}
 }

dev/Styles/Admin/Domain.less

@@ -30,7 +30,7 @@
 
 	.tab-content {
 		grid-column-end: 5;
-		border: 1px solid #ddd;
+		border: 1px solid var(--border-color, #ddd);
 		padding: 10px;
 	}
 }

dev/Styles/Main.less

@@ -88,7 +88,7 @@ dialog:not(.animate) {
 
 dialog > header {
 	padding: 9px 15px;
-	border-bottom: 1px solid #eee;
+	border-bottom: 1px solid var(--border-color, #ddd);
 
 	// Close icon
 	.close {
@@ -115,7 +115,7 @@ dialog > footer {
 	padding: 14px 15px 15px;
 	margin-bottom: 0;
 	text-align: right; // right align buttons
-	border-top: 1px solid #ddd;
+	border-top: 1px solid var(--border-color, #ddd);
 	border-radius: 0 0 6px 6px;
 
 	// Properly space out buttons

dev/Styles/_BootstrapFix.less

@@ -8,7 +8,7 @@
 	line-height: @baseLineHeight * 1.5;
 	color: @grayDark;
 	border: 0;
-	border-bottom: 1px solid @dropdownDividerTop;
+	border-bottom: 1px solid var(--border-color, #ddd);
 }
 summary.legend {
 	display: list-item;

snappymail/v/0.0.0/themes/SquaresDark/styles.css

@@ -4,6 +4,7 @@
 	--main-color: #fff;
 	--main-bg-color: #48525C;
 	--main-bg-image: url("images/background.jpg");
+	--border-color: #555;
 
 	/* LOADING */
 	--loading-color: #ddd;
@@ -94,12 +95,6 @@
 	color: var(--main-color);
 }
 
-.legend,
-dialog header, dialog footer,
-.table td, .table th {
-	border-color: #555 !important;
-}
-
 .legend,
 .messageView #messageItem {
 	color: var(--main-color);

snappymail/v/0.0.0/themes/example.css

@@ -7,6 +7,7 @@
 	--main-bg-size: auto;
 	--main-bg-repeat: repeat;
 	--link-color: #369;
+	--border-color: #ddd;
 
 /* LOADING */
 	--loading-color: #000;

vendors/bootstrap/less/variables.less

@@ -38,7 +38,7 @@
 @tableBackground:                   transparent; // overall background-color
 @tableBackgroundAccent:             #f9f9f9; // for striping
 @tableBackgroundHover:              #f5f5f5; // for hover
-@tableBorder:                       #ddd; // table and cell border
+@tableBorder:                       var(--border-color, #ddd); // table and cell border
 
 
 // Buttons