Nymhs (noun. nym) - A gender which exists but is nebulous or undefined.
Coined 12/2015 by Selkey Aliénrive (@xelortrash or @shaleselkies Edit: Now @linesofgold )
Nymhs, derived from both nimbus and nebula, refers to a gender which exists but is nebulous in nature - definitely present but indistinct and unable to be defined in any more exact light. Drawing from this meaning the flag is loosely based off of Saturn and colors often seen associated with space, nebulousness, or lack of form. (fun fact: it can also be seen to resemble a stage of the formation of a protostar from a nebula but that’s less commonly known)
Also aiming to reduce ‘othering’ and increase accessibility to children in particular this gender can be referred to using both the adjective form ‘nymhs’ (e.g. ‘I identify as nymhs’ or 'a nymhs individual’) and the noun form of 'nym’ (e.g. 'I’m a nym’) in the same way one may say either 'I identify as female’ or 'I am a girl’.
The original flag is the first listed, the other two are alternative versions - the first as I was unsure if the first had enough contrast in it and the second as a version which better encompassed the nature of the identity itself.