Nope girl, you aren't over thinking. You're right, I read the novel, that color is a bad end, he indeed is obsessed. (〜￣△￣)〜
Fortunately you're right !
Purple for the magician is regrets/sadness (I won't spoil why though)
Red is true love
Pink is light affection (a pure one I think) for the little brother
Black for obsession (Eclise)
And Orange (Big Bro), I don't remember... But if we put it as a hierarchy, it would be (from Worst to Best) Black, Purple, Orange, Pink, Red. So orange is like the middle but If I remember, more on the bad side that the good one compare to Pink and Red.
Oooh, thank you for the guide. Seems to me Orange might be on the conflicted side. Since it's obvious that the stupid Eldest has the hots for her but still trying to cover it up--like dood can't understand or be honest what he wants with her (He can continue to f**k off tho, we don't like hin here ).
I haven't really read the novel so idk, but given the spoilers...
It's likely that "Black" is a bad end, like, it's a sign that the target is obsessed (I'm still kinda sad Eclise went down that route since he's had a hard life).
While red probably leans on romantic/genuine love, so the low rating for Calisto would actually make sense given how guarded and unfamiliar he is with the like.
Or maybe I'm just overthinking things and it's actually just their designated themed colors lol (￣∇￣")