What are some alternatives?
When comparing Color Hex Picker and Just Color Picker, you can also consider the following products
Image Color Picker by PineTools - Pick color from an image. Pinetools' online image color picker.
gpick - A color picker and color scheme creation tool.
ImageColorPicker.com - Pick your color online. A simple online color picler.
Pixie - Pixie is a free, open source web application that will help you quickly create your own website. Many people refer to this type of software as a content management system (cms), we prefer to call it a small, simple, website maker.
Color Picker by RedKetchup.io - Color picker from image online - Convert color codes from HEX, RGB, HSL, CMYK, HTML/CSS - Choose your colors from sampler or spectrum.
gcolor2 - GTK+2 Color Selector