Creating a complete responsive URL to Image tool with colorful styling and all its features involves HTML, CSS, and JavaScript. For simplicity, we'll use the `html2canvas` library to capture the website screenshot. Here's a complete example: ```html

URL to Image Tool

Captured Image:

``` This code creates a simple web tool that captures a screenshot of the entered URL using the `html2canvas` library and displays it on the page. It includes responsive design and colorful styling. Make sure to include the `html2canvas` library from a CDN for it to work correctly.