Live Colour Customizer Sign In

I’m trying to change the colours on my website and when I click the button “run live color customizer”, it takes me to a log-in page:

http://hb-themes.com/themes/highend/minimal/wp-login.php?redirect_to=http%3A%2F%2Fhb-themes.com%2Fthemes%2Fhighend%2Fminimal%2Fwp-admin%2Fcustomize.php&reauth=1

Tried logging in with my HB themes login and my wordpress website login. None of these work. What am I supposed to be logging in with??