Hello !
What curve is the "Standard" option ?

I though it was "Linear" but in the Hue dropdown, "Linear" isn't available while it is in the three other dropdown, with the "Standard" option.

Hey! I am sorry for the late reply! I made a note to do so when I received a notification away from home, but then I forgot about it! =( 
Yes, it is linear. I remember that I've included both "standard" and specifically named options in the dropdowns, even if they did the same, but it may very well be that I didn't for the hue! =)