i'm a dark brunette with (dark) olive green to dark hazel eyes- i'm not a vivid green- vivid greens are unusual, subtle greens can look a bit blue or aren't as noticable for their green colour. i find my colour changes with mood, but i think that depends on how dialated my pupils are and if the whites are white or more red (angry/upset). that is also probs the same for other colours.
so yes, we do exist.