Native White Balance?

Has anyone seen/read....or can someone from BM comment...on what the native white balance of the BMCC sensor is?
https://forum.blackmagicdesign.com/
https://forum.blackmagicdesign.com/viewtopic.php?f=2&t=20710
David J. Lee wrote:In a past forum/comment thread, John Brawley has estimated it at about 5000K. Not sure if I've personally seen an official number from BM.