I am assuming you are refering to a laminate kitchen worktop. If this is the case then Screwfix do a product called Colorfill worktop compound. It comes in a range of colours, haven't used the stuff myself but might help.
or I would
Firstly keep it CLEAN cover with tape for now.
Then build up with lacquer and allow to fully harden - a week.
Cut it using silver polish, brasso or similar to remove the excess from the undamaged surface.
Into the stocks I say and a goodly pelting with eggs and rotten fruit :lol:
Our last worktops wre matt black and numerous scratches appeared (out of thin air I would add :? ).
I tried all sorts but was never happy with it but the nearest I could get was the compound I bought to seal the corner joints. I think it was coloufill but from Howdens at about half the price of the sheds
Tape the edges close to the scratch and overfill slightly then as said buff it down. I made the initial mistake of not taping and managed to make the surrounding of the scratch even more apparent