[Elecraft] P3 color selection (was Re: time to order your P3, design details?)

[Kok Chen]

This web page is intended for web designers, but is useful for designing any color based user interface:

http://www.iamcal.com/toys/colors/

It lets a person with "normal" color vision see what people with various color deficiencies see.  

For example, when you check the various common anomalies on the web page, you can see that a dark blue background with a bright yellow foreground can be distinguished by most people.  But a green and red combination could be hard to distinguish by someone that has Protanopia or Deutanopia.

Now you know why some digital interfaces' waterfall display are done using the blue/yellow color scheme :-)  

cocoaModem's waterfall uses deep blue for very low level signals, transitioning to lighter blue and then to progressively brighter yellow as the signal becomes stronger, then to orange and finally ending up with bright red when the signal gets close to saturating the sound card.  Most users, unless they read the source code, probably doesn't know that there is some method to the madness of the color scheme.

73
Chen, W7AY