Pika is described as '(pronounced pi·kuh, like picker) is an easy to use, open-source, native colour picker for macOS. Pika makes it simple to quickly find colours on screen, in the format you need, so you can get on with being a speedy, successful designer' and is an app in the Photos & Graphics category. There are more than 50 alternatives to Pika for a variety of platforms, including Windows, Mac, Online / Web-based, Linux and iPhone. The best alternative is Microsoft PowerToys, which is both free and Open Source. Other great apps like Pika are Just Color Picker (Free), gpick (Free, Open Source), Instant Eyedropper (Free, Open Source) and gcolor2 (Free, Open Source).
HEX RGB color codes is a small application that allows you to easily find out a color's HEX code. You simply have to select the color and the application will automatically display the corresponding HEX and RGB codes.
Pick single or multiple pixel colors anywhere on your screen in more than 25 formats! Convert colors from one color space to another. Automatically generate color variations for the colors you pick. Built-in screen magnifier simplifies color picking.
Color Grabber 2.0 is a little Color-Picker-Tool for webdesigners for grabbing color codes (like HTML-Hex, RGB etc.) from the desktop! This tool has also a loupe function for a exactly grabbing, and a history list of grabbed color codes.