Update dashboard/src/components/GraphTemplateDetail.tsx

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: nk-ag

dashboard/src/components/GraphTemplateDetail.tsx

@@ -212,15 +212,15 @@ const GraphVisualizer: React.FC<{ nodes: NodeTemplate[] }> = ({ nodes }) => {
               type: 'default',
               animated: false,
               style: { 
-                stroke: '#87ceeb',
+                stroke: 'var(--chart-1)',
                 strokeWidth: 2,
                 strokeDasharray: 'none',
               },
               markerEnd: {
                 type: MarkerType.ArrowClosed,
                 width: 10,
                 height: 10,
-                color: '#87ceeb',
+                color: 'var(--chart-1)',
               },
             });
           } else {