A situation in which a person has the need to search for the perfect partner. However, this perfectionism often results in loneliness. This relates to ruby-blue because there is no such thing as a blue ruby.
Is Norman still dating that Casey girl even though she has crooked teeth?

Nah man, he's got a bad case of the ruby-blues.
by Faylan June 13, 2010
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Ruby Blue refers to a person who is perfect, though incredibly hard to find. It is simply a name in place of someone with out it. Such as John Doe which the police use to identify someone without a name.
"What are you doing on Tinder?"

"Just looking for my Ruby Blue."
by Jeph McCringe March 29, 2020
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