"No firsthand experience to make this a certainty? I'm surprised."
"All too long ago to remember clearly?" suggests Belle. Scritch scritch scritch.
"I'm pretty good at feeling how I want to feel, but I have to know what I'm doing," says softly. "I can decide to - to not be angry about something, if I want, because I know what it's like to not be angry. But I don't know what it's like to be in love. Even though I'd like to be."
"I know what it's like for me to be in love," says the Beast. "I don't think I know what it's like for you."
Pet pet. "It might help if you told me more about what it's like for you anyway."
"I don't know what else to say. I know what it's like; I don't know how to say what it's like."
"Maybe I should study the Heart spells," laughs Belle, "if you can't tell me - see how the spell's defining it. It must have a definition."
Studying detour. It must explain all those colors somewhere.
...not very specifically.
Apparently the exact shades vary from person to person. There is an incomplete list of which emotions are usually associated to which hues; romantic love is indeed sometimes violet. And the exact shades are consistent between repeated viewings by the same enchanter, so an experienced enchanter can learn to distinguish emotions very well if they have the patience to study live examples.
All right... she remembers checking the fondement to see if romantic love in particular was required, and she remembers that it was but what else is in her notes...
While she looks it up, the Beast curls up on the floor and snuggles against her legs.
Her notes are inconclusive on the question she's curious about. Drat. It does have to be romantic; it doesn't have an exhaustive description embedded in the spell of what that is.