[Cdash] coverage color palette

[Zack Galbreath]

I got a chance to work on this task a bit this morning.  I used the 
clear favorite from the Doodle survey to change the colors associated 
with "normal", "warning", and "error" in CDash.  I generated new colors 
for the odd rows by converting the selected colors to HSV, and then 
subtracting 5 from their value.

Take a look at the results and let me know what you think.  If 
everyone's satisfied, I'll commit this change to CDash trunk and 
continue hunting for stray color codes that should also be updated.

new color scheme:





For comparison, here's how this page looks under the old (current) color 
scheme:


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