To add a color to the shadow, use the box-shadow property and set the color, with the height and width.
You can try to run the following code to set the color to shadow:
Example
<!DOCTYPE html> <html> <head> <style> h2 { box-shadow: 10px 10px green; height: 70px; background-color: red; } </style> </head> <body> <h2>Heading Two</h2> <p>Above heading has shadow.</p> </body> </html>