Sumit. M. Asok sumitasok

## Dockerfile
FROM python:3.6-slim-stretch

ADD requirements.txt /tmp/requirements.txt

RUN apt-get update && \
    apt-get install -y \
        build-essential \
        make \
        gcc \
        locales \

## An-Anonymous-Pen.markdown

      
        
          
            
              
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                sumitasok
                / An-Anonymous-Pen.markdown
            
            
              Created
              September 5, 2013 15:07
                — forked from anonymous/An-Anonymous-Pen.markdown
            
          
        
      
        
  
      
    An Anonymous Pen

Compass's color contrast mixin seems to favor dark text because it depends on the HSLA lightness of a color. Selecting between light and dark text based on a lightness threshold is not enough to make proper color contrast decisions.
W3C discusses an algorithm to ensure a color is well contrasted against a background. http://www.w3.org/WAI/ER/WD-AERT/#color-contrast
I've used the algorithm here for finding the difference between a given background color, and specified light, and dark values. The mixin will use the light or dark value that has a greater difference form the background color.
I left the compass "contrasted" mixin commented in the code, un comment to see the difference between contrast choices.
	FROM python:3.6-slim-stretch

	ADD requirements.txt /tmp/requirements.txt

	RUN apt-get update && \
	apt-get install -y \
	build-essential \
	make \
	gcc \
	locales \