How Would You Paint Regret?

How would you paint regret;
what colour would I be?
I wonder how much time
your brush would spend in hues of me.
 
How much would dissappear;
a speck of orange amongst green?
Imagined and resolved
in a tranquil forest scene.
 
I doubt that I'd be blue;
that your easel would hold sea.
I know you are no island,
nor I think myself Daphne.
 
Why must I always wonder?
My mind never leaves things be.
Your tides go but return again,
and I ponder galleries.
 
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Thanks for reading, any constructive criticism is welcome!