Web app to extract all colours of an image

Question

Does a web-app exist where I can upload an image, and all the colours used in that image are analyzed and displayed for me to use, with a sample next to the colour?

Requirements:

• free
• web-app
• upload .jpg, .png (anything else is a bonus)
• shows me the HTML HEX code, and RGB code
• shows me the name (if applicable)
• shows me a sample of the colour for every colour code.

Answer 1

Counteracting my rusty HTML 5/JS skills, I've created such a webapp:

Website: http://comfreek.github.io/ColorSplitter/
Repository: http://github.com/ComFreek/ColorSplitter

It is/does:

• free (MIT license)
• a webapp (the image is processed on the client side in the browser, so no image is ever uploaded to a server)
• support JPG and PNG files among others
  The webapp can handle every format the browser supports loading into an <img> element)
• show the HEX and RGBA color codes
• show the CSS color name if applicable
• show a color sample in a box for every found color

These browsers are known to work with ColorSplliter:

• Google Chrome 39.0.2171.93 (on Android)
• Google Chrome 41.0.2258.2 canary (on Windows)
• Opera 26.0.1656.60
• Firefox Nightly 37.0a1 (2014-12-25)
  (Note that the number of pages and the current page number are erroneously not shown, however, the rest of the web app is still usable.)

Screenshot: