How to change the butterfly to a blue gradient

Quick answer：

To change a butterfly image to a blue gradient, you can use graphic design software such as Adobe Photoshop. Here's a basic guide: 1. Open the butterfly image in Photoshop. 2. Create a new adjustment layer for gradient fill. 3. Set the gradient to a blue color range, adjusting the sliders to achieve the desired gradient effect. 4. Adjust the blending mode of the gradient layer as needed. 5. Save the file.