Whatever shade, if you've a bright idea then click on the title and comment below.

What's white or grey or brown on back?

Or beautifully just jet black?

What's jumped upon by kids that smother?

Whatever colour, another

One, but know that in this town

There's only one me 'round.

'So you're round?'
'Yes, I'm 'round, though one.'
'What shape is the other?'
'The other's none.'

Riddle Answer A Horse

Riddle Explanation
or beautifully just jet black? - black beauty.

what's jumped upon by kids that smother? - an athletics horse.

whatever colour, another - a horse of another colour.

but know that in this town there's only one me 'round - a one horse town.