2005–2011 (main), 2011-2017 (secondary)
YouTube's first and longest-used logo consisted of the site's name in the Alternate Gothic typeface, with the word "Tube" being placed inside a red rounded rectangle, representing a television. This logo is still being used on some pages.
This modification of the YouTube logo was introduced in July 2011 as a part of the "Cosmic Panda" experiment, and officially became the new logo a few months later. It has the red rectangle in a darker color this time. Also, starting in late November 2012, the slogan "Broadcast Yourself" was retired, This logo first appeared on the website as of December 2011.
On December 19, 2013, the red rectangle was made lighter in color. Also, the word "You" was made more black and the shadow behind the word "Tube" was removed.
YouTube's logo became purely two-dimensional in October 2015, with the introduction of its paid subscription service YouTube Red. This redesign may have also been made to be in line with Google's "Material Design" design language.
On August 29, 2017, YouTube launched its most significant logo update yet, dropping its original logo design after 12 years, consisting of the wordmark in "almost black" (#282828) and a slightly modified typeface placed to the right of YouTube's priorly redesigned universal icon, the play button, whose color is now pure red (#FF0000). The logo change accompanies a set of new experiments YouTube is set to roll out over the next few months.
- Main article: YouTube Yoodles
Much like Google with their Doodles, YouTube occasionally changes their default logo to a stylized one with relevance to a certain date on various days throughout the year. These special logos are sometimes called "Yoodles".