Thank you for announcement!
If anyone has any questions or problems with color editor, please post it here.
Editor is rather simple: just move sliders, sample on right side will change, then click download button to download style with those colors.
Unfortunately there is no tutorial on how to edit style colors, I'm rather bad at making them and my accent is horrible anyway so people would have hard time understanding. I'd appreciate if anyone made one. Something like a youtube video would be awesome.