How to change gradient color on blue background

Quick answer：

To change the gradient color on a blue background, you can use graphic design software such as Adobe Photoshop or Illustrator. Open your design, select the gradient tool, choose the desired gradient colors, and then drag the gradient tool across the blue background to apply the new gradient. If you're coding a website, you can use CSS gradients to achieve a similar effect by using the 'linear-gradient' or 'radial-gradient' functions.