W3C CSS Validator

Has anyone worked with the W3C CSS Validator much?  I ran our code through and came up with so many "You have no background-color with your color".  I thought this did not need to be specified?  Pls remember, I am new to this validator, CSS and still learning it.

Here is the results of the first pass.

Line : 18 Level : 1 You have no background-color with your color : A:link 
Line : 20 Level : 1 You have no background-color with your color : A:visited 
Line : 22 Level : 1 You have no background-color with your color : A:active 
Line : 44 Level : 1 You have no background-color with your color : H1 
Line : 53 Level : 1 You have no background-color with your color : H2 
Line : 65 Level : 1 You have no background-color with your color : H3 
Line : 74 Level : 1 You have no background-color with your color : H4 
Line : 87 Level : 1 You have no background-color with your color : .title 
Line : 96 Level : 1 You have no background-color with your color : .title2 
Line : 103 Level : 1 You have no background-color with your color : .policyfooter 
Line : 112 Level : 1 You have no background-color with your color : .smallblue 
Line : 119 Level : 1 You have no background-color with your color : .mysmall 
Line : 145 Level : 1 You have no background-color with your color : .subtitle3 
Line : 145 Level : 1 Same colors for color and background-color in two contexts .tabletitle and .subtitle3 
Line : 154 Level : 1 You have no background-color with your color : .subtitle4 
Line : 164 Level : 1 You have no background-color with your color : .subtitle1 
Line : 164 Level : 1 Same colors for color and background-color in two contexts .tabletitle and .subtitle1 
Line : 172 Level : 1 You have no background-color with your color : .subtitle2 
Line : 188 Level : 1 You have no background-color with your color : HR 
Line : 202 Level : 1 You have no background-color with your color : .ss 
Line : 202 Level : 2 You are encouraged to offer a generic family as a last alternative : .ss 
Line : 204 Level : 2 You are encouraged to offer a generic family as a last alternative : .xxx 
Line : 205 Level : 1 You have no background-color with your color : .xxx