Use of HTML and CSS logos

To Whom It May Concern,

I am wanting to use the HTML and CSS logos for a board game I am designing. I have looked on your website, and I have seen that the HTML logo is under the Creative Commons Attribution 3.0 Unported. However, I have not found any information on use of the CSS logo, which, from my understanding, was also created by W3C. If so, is it under the same licensing as the HTML logo? I was also wondering if there was any specific phrasing I should use when giving credit to the logo(s). For example, I was thinking of using the following sentence in the game: The HTML logo is licensed under Creative Commons Attribution 3.0 by World Wide Web Consortium.

Please let me know if you have any questions, or if I am unable to use the logo for this purpose.

Thanks,
Logan W.