#5601: Colors: CSS3/SVG presets, construct from HSL/HSV, lighter/darker methods,
linearly combine
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   Reporter:  jason        |       Owner:  was                             
       Type:  enhancement  |      Status:  needs_work                      
   Priority:  minor        |   Milestone:  sage-4.3                        
  Component:  graphics     |    Keywords:                                  
Work_issues:               |      Author:  Mitesh Patel                    
   Upstream:  N/A          |    Reviewer:  Jason Grout, Karl-Dieter Crisman
     Merged:               |  
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Comment(by jason):

 I think MMA just does a weighted average of colors.  In other words, for
 each component, color1.blend(color2,fraction) would create a new color
 (1-fraction)*color1+(fraction)*color2.

 I thought color1+color2 would be color1.blend(color2,1/2)

 MMA then has:

 color.lighter() is just color.blend(colors.white,1/3)

 color.darker() is just color.blend(colors.black,1/2)

 I'm not quite sure what this patch does.

-- 
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/5601#comment:36>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica, 
and MATLAB

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