iColors is described as 'Stand alone color picker for mac' and is an app in the Photos & Graphics category. There are more than 50 alternatives to iColors for a variety of platforms, including Windows, Mac, Linux, Online / Web-based and iPhone. The best alternative is ShareX, which is both free and Open Source. Other great apps like iColors are Just Color Picker (Free), gpick (Free, Open Source), Instant Eyedropper (Free, Open Source) and gcolor2 (Free, Open Source).
ShareX is a free and open source program that lets you capture or record any area of your screen and share it with a single press of a key. It also allows uploading images, text or other types of files to over 80 supported destinations.
Instant Eyedropper is a free color detection tool for webmasters that will identify and automatically paste to the clipboard the HTML color code of any pixel on the screen with just a single mouse click.
gcolor2 is a basic colourpicker utility that allows you to select any colour on your screen, and, well, grab it's colour. It also allows you to save the colour you create to a file, which shows up as a list in the application.
The refreshingly simple color picker for developers that instantly samples and encodes any color on your screen. Just one quick click to savor the flavor and you're set! See what’s on special with Sip below.
Small utility that can show you coordinates and color of any pixel on your screen in different formats (HEX, HTML, RGB, CMYK, HSV). It's staying on top, displays a color of that pixel under mouse cursor, the program can magnify that zone w/ hotkey.