You may have see the red and pink equal sign come up on your Facebook news feed. It is a stylized version of the Human Rights Campaign logo that people started posting Tuesday because the Supreme Court heard arguments in a marriage equality case.

"The logo has been hard to miss on Facebook news feeds, especially after George Takei's profile picture change garnered nearly 40,000 likes from his enormous fan base Tuesday morning.

'For those friends wondering, this special 'red' equality symbol signifies that marriage equality really is all about love. Thanks to the Human Rights Campaign for this effort. Please consider changing your profile today in support—esp if you are a straight ally,' Takei wrote."