HTML and CSS Reference
first “r” in the background-color property. Remove the # from the color property
value. Save the file.
Next, attempt to validate the color.css file. Visit the W3C CSS Validation Service page
at http://jigsaw.w3.org/css-validator and select the “by File Upload” tab. Click the
Browse button and select the color.css file from your computer. Click the Check button.
Your display should be similar to that shown in Figure 3.19. Notice that two errors
were found. The selector is listed followed by the reason an error was noted.
The validation results
The valid CSS is
displayed below the
errors (and warnings,