Not what you think

Hope is the answer
To the riddle below,
But the answer to this one,
I doubt you will know.

Red is her color,
But then so is green,
And most of the time
Her influence is unseen.

But when it is noticed
its loudly proclaimed
and yet of this glory
she is so ashamed.

For she only wishes
that love, Joy, and Cheer,
Be sent from the father,
through her all the year.

What is it?