improve text visibility

src/assets/css/custom.css

@@ -19,7 +19,7 @@ body.loading .loading-overlay{
 }
 
 .container-header {
-    background-color: #3DB9D380;
+	background-color: #008eb9;
     width: 100%;
     box-sizing: border-box;
     padding: 2px;
@@ -113,15 +113,15 @@ body.loading .loading-overlay{
 }
 
 .icon-toolbar {
-    color: rgba(255, 255, 255, 0.726);
+    color: #ffffff;
 }
 .icon-toolbar:hover {
-    color: rgb(255, 255, 255);
+    color: #ffffff;
     cursor: pointer;
 }
 
 .icon-toolbar-separator {
-    color: rgba(255, 255, 255, 0.726);
+    color: #ffffff;
 }
 
 .btn-icon-toolbar-label {
@@ -244,3 +244,15 @@ table.dataTable th {
     max-height: 100%;
     width: 100vw;
 }
+
+.gantt_grid_head_cell {
+	font-size: 0.75rem;
+	color: #303030 !important;
+	font-weight: 900;
+}
+
+.gantt_scale_cell {
+	font-size: 0.75rem;
+	color: #303030 !important;
+	font-weight: 500;
+}