Well all spells come down to intent, not colour, so I do believe in both. If needed I won't shy awake from the darker forms of magick [curses] but the need hasn't come up yet so I've never cast one. I focus on luck and healing which I'm best at.
I've never cast a love spell for myself, but those work too, just gets sticky once morals enter into it. Personally I've never seen why you would want to force someone to love you. I have had some strong crushes and have been rejected but I've never thought of casting over the person. Just my views anyway.
I am Wiccan, and I first found this site when I was researching the path. While spell casting sounded cool, I understood it should be used as needed, not for fun, for gain, or to show off. I did meet many pagans online and offline who gave me many spells, and I have filled many books with spells, but I don't cast much [excluding protection and cleansings I might cast a spell once a year because I don't need it.]
Why do you ask?