line 745 in ivory.css had a hex color of color:#ooo changed it too color:#000

While precompiling a .png file in Rails while pushing to Heroku I came across an invalid css error, which lead to me search out the line. 

At line 745 in ivory.css it had a hex color of color:#ooo 

` .accordion a:hover, .accordion a:focus {opacity:.9; color:#ooo;} `

I changed it to the following, which allowed the precompile to pass without errors. 

` .accordion a:hover, .accordion a:focus {opacity:.9; color:#000;} `