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Color naming is an active field of research and has been for decades. See this example of work by the US National Bureau of Standards (NBS) from 1965. I include this reference only because it shows the length of time people have been thinking about this and that technology keeps making the problem fresh - notice the reference to reproducing the colors in ...

I think you are quite safe using the 147 html and css color names to communicate the correct color to users. It should be more than enough, but still colors based on W3C's standard.

This seems more of a graphic design question. That is, it seems you know you want green for authorization but need to know what shade of green (the graphic design bit). You can use a green that fits into your colour palette better. Say you took the pale blue and used the same lightness and saturation but changed only the hue to a green, you'd get something ...

Remember that colour shouldn't be the only way you communicate status. It possibly shouldn't even be the primary way: You should include some other depiction - an icon helps, as you've shown, but perhaps something more obviously 'authorizing' might be better. Not everyone can see in colour - particularly red vs green. Red/Green colour blindness affects ...

There are measures you can take to work with web compatible color profiles as SteB mentioned, but the overal problem you're describing is generally an accepted downside to other people being able to view your document on their own screens. Most computer screens even fluctuate ever so slightly over time in regards to color, so even if you had the same model ...

Both previous answers (by Benny Skogberg and user1757436) are good ones but I suggest something specified by a definitive link in the domain of w3c.org. http://www.w3.org/TR/css3-color/#svg-color http://www.w3.org/TR/SVG/types.html#ColorKeywords I think w3c.org has enough gravitas for anyone involved in the UX/UI/software design fields and the links will ...

See http://www.websitemagazine.com/content/blogs/posts/pages/trust-and-the-theory-behind-color.aspx: "Blue, often associated with stability, symbolizes trust, wisdom and confidence. Blue has been shown to produce a calming effect and is often used to promote products and services related to cleanliness. More accepted by males than females, it is a preferred ...