Steve Jobs fans are being encouraged to wear black turtlenecks to the WWDC keynote tonight in memory of the late CEO and co-founder of Apple.

"Steve Jobs was a creative genius and inspired countless people," reads the challenge posted online at "Let's come together this week and pay tribute to him by wearing black turtlenecks (if you don't have one, you can at least wear a long-sleeved black t-shirt)."

The challenge reads: “In honour of the Apple Worldwide Developers Conference (WWDC), join Apple fans all over the world and wear a black turtleneck one day this week (June 11-15) as a tribute to Steve Jobs.”

"We're just huge Steve Jobs fans and with the Worldwide Developers Conference coming up, it seemed to fit perfectly," Jason Davis, ChallengeLoop's CEO, told the Daily News. "We really wanted to create something that everyone could do whether you're there or not."

Steve Jobs famously wore a black turtleneck and jeans at almost every keynote he delivered. 

Let us know if you will be wearing a turtleneck to the keynote later.