A simple way to organize, preview and copy your favorite color palettes all in a single file.
Codepen Demo: https://codepen.io/butnotexactly/pen/XWWRYdR

Save the html file (optionally to your Dropbox, repository, USB drive or cloud folder).

Alternatively, host one online using something like Codepen, and bookmark the URL: https://codepen.io/butnotexactly/pen/XWWRYdR

Open the file in a text editor (Notepad, Sublime Text) and add colors or palettes in the provided space. The syntax is extremely simple; brackets for a palette, a hexcode for a color. Comments and blank lines are fine too and will be ignored.

[flat ui]
#2c3e50
#e74c3c
#ecf0f1
#3498db
#2980b9

Double-click the file to open it in your default browser. Click a color to copy it automatically, or a palette name to copy every color separated by a line.

• Easy to edit; just open the html file in a text editor and add a few colors in the provided space, save and reload
• Lightweight, offline and portable — it's a single file, and easily be placed in Dropbox or Git or on any device
• Perfect for quickly referencing colors (click a color->copy color, click a title->copy all the colors)
• Doesn't require another app or service (you can just open it in browser to read from or a text editor to edit)

No, it's a single, offline static HTML file without any read or write access.