When you want your dashboards to stand out and engage users, customizing the appearance of your ECharts visualizations is essential. ECharts provides flexible options to modify colors, apply gradients, and use themes, allowing you to create charts that align with your brand or application's style. You can set specific color palettes for chart elements, use gradients for a more modern look, and apply global themes for consistency across multiple charts. These tools help you move beyond basic charts and deliver a polished, professional experience.