1. Open your image in Photoshop (quite simple, isn't it?) 2. Convert to grayscale 3. Use the following filter: Stylize / Find Edges 4. Adjust Brightness / Contrast I left Brightness unchanged and set Contrast to +50 Clean your image and erase the parts you don't need 5. Use the following filter: Stylize / Glowing Edges I have set these values: 2 - 6 - 5 6. Set the image mode to RGB Color Add a new layer Set the Blending Mode to Multiply Select your desired color I have used the following RGB values: 67 - 188 - 236 Fill the whole layer with the Paintbucket Done!