help me with CSS

for adding images on top of blogs you just copy the image address into the blog and thats it
so right click the copy image address and for mac its control click and yea pretty simple!

.tableLeft, .tableRight {
background: #(put color here);
width: 25%;
border-bottom: 2px solid #fff;
padding: 10px;
vertical-align: top;
overflow: hidden;
}