Note that this markup uses a combination of inline attributes for styling (the BackColor) and the
CssClass to point to a selector in your CSS file. Also note that this control does not have an ID
attribute. As explained earlier, you can ignore the warning about missing build providers because
your skin files will work fine at run time. As soon as you close the skin file, the warning goes
away.
3. Open the Monochrome.css file from the theme folder and add this CSS selector at the end of the
file: