Huh?
Whose perspective is this description for?
Everyone has different preferences for their romantic parnters and for who they think would be cool to hang out. Some don't really care how non-human a character is to go on a date -- a triangle chao entity with a tophat (fanart does exist . . .!?!)
One might find the romantic attraction to be zero for other reasons, such as opposite gender or their actions (fighting monsters) -- and yet a different person may have fallen in love for the same reason. You cannot predict who a random someone will find personally attractive.
Overall, I think most people's reaction to a stranger's appearance would only include "I may like to go out with this stranger" IF they are feeling attraction. Otherwise, we don't really consider it. If your story-specfic perspective is feeling attraction, that is what you should write.
Let's take Dahlia from the dating game: "Monster Camp" for example. She is one of the character you can hang out with and/or date. Why would you choose or not choose her on a dating route? Is the the colour of her skin and hair part of any of your reasons?

Oh, and for outcast reactions from general crowd, possibly reference "Wicked". Elphaba has green skin.