ColorFish is an advanced open-source color picker and eyedropper tool designed for web development and IT professionals. This Firefox extension allows users to select color values from both websites and desktop applications, making it versatile for various design tasks. Key features include the ability to pick colors from any pixel on a webpage or desktop, color history tracking, and automatic color copying to the clipboard. Keyboard shortcuts enhance usability, while support for dynamic hover elements and Flash objects expands its functionality.

Additionally, ColorFish operates at any zoom level and provides a single-click interface for quick color picking. For users wanting to access desktop color selection, installation of the free UI.Vision RPA software XModule is required. This native application supports multiple operating systems, including Mac, Linux, and Windows. Overall, ColorFish is a powerful tool for developers looking for a reliable and feature-rich color picker.