"Profile name color You must use hex color format" ERROR

Getting the following message when I try to uncheck the radio buttons in Notices for email options (ie I don't want any messages sent to me):

1 error prohibited this current user from being saved
There was a problem with the following field:
Profile name color You must use hex color format

I uncheck the boxes so that I DON'T get notifications for new friends or DMs. I don't want them. But I can't save because of the error above.

Thanks.