In this world, gender isn’t about body shape and pronouns. It’s about colours and hex codes. The dipshits are cischromatic greyscales. Green, Blue, and Legend are transchromatic. Green is an out primary colour. Blue is a closeted primary colour. Legend is an out teriary neohex-using colour.

Think of greyscales as cis, primaries as binary trans, secondaries as nonbinary androgynous, tertiaries as nonbinary xenogender, hex codes as pronouns, and impossible hexes as neopronouns, especially neogrammatical pronouns.

Also, it’s not relevant to this particular comic, but Unwanted Purple Syndrome is an intersex condition.