Theme individual blocks, with rounded corners, and different colors

Hello all,

I ahve been developing this website for almost a year now, on and off with a client. This has led to a lot more code than i really want so I am wondering if you all could give me some advice on making this particular problem I am having, not be as bloated as I am thinking of doing it. There must be a better way.

I am giving borders to all of the blocks and these borders are supposed to be rounded. I am currently using the nifty rounded corner technique from http://www.html.it/articoli/nifty/index.html

However the boss wants a change and wants the border only and no internal color. He also wants each one to be different depending on the block type. So I jury-rigged it and it works for the most part except for ie6. I am unhappy with it though because it is just way to much code and it really doesn't look as nice as I would like. Is there a more elegant way of doing this?

I am also wondering if you could take a look at the way I am calling the block names to style the individual blocks. Is this the best way?

<b id="<?php print $block->module ?>" class="rbottom">

block.tpl.php full

<b id="<?php print $block->module ?>" class="rtop">
 <b class="r1"></b> <b class="r2"></b> <b class="r3"></b> <b class="r5"></b></b>
 
<div id="sidebar-right-border" class="<?php print $block->module ?>">
<div id="block-<?php print $block->module .'-'. $block->delta; ?>" class="block block-<?php print $block->module ?>">


<?php if ($block->subject): ?>
  <h2><?php print $block->subject ?></h2>
<?php endif;?>

  <div class="content"><?php print $block->content ?></div>
  
</div>
</div>

<b id="<?php print $block->module ?>" class="rbottom">

  <b class="r5"></b> <b class="r3"></b> <b class="r2"></b> <b class="r1"></b></b>
  
<br />

CSS

#sidebar-right-border {
	padding-left: 5px;
	border: 2px solid #CC6600;
}

.rtop, .rbottom{
	display:block;
	background: #fbfbfb;
}
.rtop *, .rbottom *{
	display: block;
	height: 1px;
	overflow: hidden;
	background:  #CC6600
}

.rtop *, .rbottom *{
	display: block;
	height: 1px;
	overflow: hidden;
	background:  #CC6600
}

.r1{margin: 0 5px}
.r2{margin: 0 3px}
.r3{margin: 0 2px}
.r5{margin: 0 1px}
.r4{margin: 0 0px; height: 2px}

#menu-top b {
	display: none;
}

#menu-top #sidebar-right-border {
	border: 0px;
	background-color: #fbfbfb;
	padding: 0px;
	margin: 0px;
}

#sidebar-right-border.blog {
	border-color: #0000CC;
}

#blog.rtop *, #blog.rbottom * {
	background: #0000CC;
}

#sidebar-right-border.user {
	border-color: #FF0000;
}

#user.rtop *, #user.rbottom * {
	background: #FF0000;
}

#sidebar-right-border.search {
	border-color: #999999;
}

#search.rtop *, #search.rbottom * {
	background: #999999;
}

#sidebar-right-border.menu {
	border-color: #999999;
}

#menu.rtop *, #menu.rbottom * {
	background: #999999;
}

#sidebar-right-border.comment {
	border-color: #006600;
}

#comment.rtop *, #comment.rbottom * {
	background: #006600;
}

#sidebar-right-border.comment {
	border-color: #006600;
}

The site is http://www.b2btribes.com