Thank you for everyones help. unfotunately, I cannot do anything with a css stylesheet with yahoo sitebuilder. basically, with sitebuilder, you use templates..I used an html template and put the H1 tag in there and just pasted it on the page where I wanted it. It looks centered in IE and color black like it should in IE, firefox off centers it and makes it red. I did try to add the different color values and it does nothing.

What is there now is this:
h1
{
font-weight:bold;
color:#000000;
font-size: 18px;
}
</style>
<h1>Buy Taser, Stun Guns, Pepper Spray. Purchase Mace, Personal Alarms, Home Security Products, And Animal Repellents. Check Out Our Sale!</h1>

Cbosleeds suggested to do this : <h1 style="color: #000;">some text</h1>
Isn't this the same as to what I have already??

Any other suggestions??? I did ask yahoo support and they are stumped...Thanks Everyone!