On 1 April 2010 11:06, Luke Benstead <[email protected]> wrote: > On 1 April 2010 10:52, Thorsten Wilms <[email protected]> wrote: > > On Thu, 2010-04-01 at 10:02 +0100, Mark Shuttleworth wrote: > > > >> There should be a rationale and guidance for the use of the various > >> colours. For example, red is clearly an alert colour, as is orange. When > >> would one use red and when orange? Both indicate a caution or warning. > >> Green indicates something that one should be aware of that is NOT a > >> warning or caution, such as a message. So I would expect the document to > >> include: > > > > Leaving color-deficient-vision issues aside (the usual advice is to not > > rely on color alone, but to use other clues such as shape): > > > > Red is used to mean Stop on traffic signs and lights. It stands for > > record armed or in progress in the audio realm. > > > > I'd use orange for warnings and red for state or use only one of the 2. > > > > Taking from traffic and audio again, green stands for go!, you-can-pass, > > playing (playback, not toys). It shouldn't be used if something is not > > in an all-OK state, I think. > > Also, someone mentioned (I can't remember where, a forum or something) > that Blue is usually associated with conveying general information > which is certainly the case for road signs in the UK at least, and > searching Google images for "information icon" comes up with a load of > Blue icons :)
> I'd suggest that Blue makes more sense for something like "new mail" > rather than Green. > > e.g. > > Red = Error/Alert > Orange/Amber = Warning (it could be argued that restart required > belongs here really (e.g. security update)) > Blue = Information (e.g new mail) > Green = It's OK for you to go ahead and do something (e.g. signing > into something) > > Although +1 for the icons changing with the colour. Indeed, Blue seems to be more of a passive color. It is informing, not necessarily demanding to take action. (True for German road signs as well.) Plus, the standard link color is Blue. Though this may be a counter-point to the »not demanding to take action«. It also is neither positive nor negative (e. g. new mails are not always good). Colors mixed with Blue have a similar effect on the base color, making it less active: Green -> Turquoise; Red -> Purple (already used ;D).
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