Add table row in jQuery.Convert HTML CSS to PDF with PHP? CSS3s border-radius property and border-collapse:collapse dont mix. How can I use border-radius to create a collapsed table with rounded corners? Though your html table might render properly in the browser, its a different story with the email clients (I have tested with Outlook only).But notice that black border is nowhere to be seen. Use of border2 bordercolorblack attributed in the table tag. To separate the contents of one cell from another, the borders are added. To create those use parameters border of the tag table, which determines the width of the border and bordercolor - which sets the color.Tags: Border Programming languages Textile HTML CSS Table.