Alfred Color Workflow
I saw a mention by @adamwathan about an Alfred workflow for working with colors. After a little digging, I was lead to @tylereich's Alfred Color Workflow.
It works with both CSS colors (Hex, RGB, HSL, Named Colors) and NSColor (although I only tried CSS).
Setting it up takes a couple of steps, but this has more to do with the OS X security model than Alfred or the developer's work.
- Download the Workflow
- Open in and add it to Alfred
- Type a Hex color, named color (c blue), etc.
At this point, OS X is going to tell you it cannot verify the developer. To move forward, go to System Preferences → Security and Privacy → Allow Colors.
Once this is complete, try step #3 above again. You will again get a warning about an Alfred helper. Approve this one and you are good to go.