An abstract that meets the challenge to some degree.
When the challenge description gives you the scope it has in defining orange as a range of colours between red and yellow not all will recognise the 'orange' qualities equally. Whilst your image has appeal it is significantly towards the red end of the definition to the extent that the smaller yellower elements in the top left stand out as being distinctly orange by comparison. If it had been me I would probably have subtly altered the hue more towards the yellow spectrum to get nearer a recognisably distinct orange through more of the image.
Having never tried to capture this sort of image I assume the long exposure enabled you to bring out more of the glow and less of the blacks because of the changing nature of the glowing embers? Bet you were nice and warm for this one!