This one doesn't work for me because I find it too wordy and am not sure what you are getting at. Cecil and I had two different takes on your haiku. Are the other greens lonely? Are the other colors lonely? Do colors get lonely? Hah! You caused quite the discussion around here!
This would be my take:
shades of green
a shaft of light
but then I tend towards minimalism...hence my love of haiku.