changing colors in stylesheet

Hi,

I’m trying to edit the stylesheet for my blog, http://sunhammerpounding.com

What I want is for the stuff in the left column to alternate colors with every post, so where the date and “write comment” are blue, the hover is orange. Where date and “write comment” are orange, the hover is blue. I have the following code which should do it as far as i know, yet it’s still not working. Any tips?

Thanks,
Jay

/* odd post color */
.meta_comment a, .meta_comment a:visited, .post_date, .post_meta dt.meta_comment { color:#33a8e5; }
.post_odd .post_meta a:hover
{ color:#ff6600; }

/* even post color */
.meta_comment a, .meta_comment a:visited, .post_date, .post_meta dt.meta_comment { color:#ff6600; }
.post_even .post_meta a:hover
{ color:#33a8e5; }