Blue, the colour of the sky, the ocean and sea.
Blue, a colour found everywhere, but never found on a tree.
And if you were to put it on a tree,
Why, what shade would it be?
Would it be turquoise, lilac or indigo?
Could it be sapphire, teal or Prussian blue?
But if you coloured it ultramarine,
Would any of those colours look good on a tree?