Hello,
I added a color scheme for 'silver'. While it requires CSS3 for the full effect, it degrades decently, and looks good.
Add the following lines to colortip-1.0jquery.css:
.silver .pointyTip { display:none; }
.silver .pointyTipShadow { display:none; }
.silver .colorTip {
color:#333;
font:10px arial;
background: #fefefe;
background: -moz-linear-gradient(top, #fefefe 0%, #e5e3ee 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#fefefe), color-stop(100%,#e5e3ee));
background: -webkit-linear-gradient(top, #fefefe 0%,#e5e3ee 100%);
background: -o-linear-gradient(top, #fefefe 0%,#e5e3ee 100%);
background: -ms-linear-gradient(top, #fefefe 0%,#e5e3ee 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#FEFEFE', endColorstr='#E5E3EE',GradientType=0 );
background: linear-gradient(top, #fefefe 0%,#e5e3ee 100%);
padding:5px;
-moz-border-radius:2px;-webkit-border-radius:2px;border-radius:2px; border:1px solid #696969;
box-shadow:2px 2px 3px #696969; -moz-box-shadow:2px 2px 3px #696969; -webkit-box-shadow:2px 2px 3px #696969;
}
Then modify line 9 of colortip-1.0-jquery.js to this:
var supportedColors = ['red','green','blue','white','yellow','black','silver'];
Now silver becomes one of your coloration options.