Colour Quiz

[denquiz]

Hi folks, I'm just stuck on this last one, can anyone give me a clue? The answer contains a colour.

Good for tomatoes (10 letters).

I'm sure it is something pretty obvious but I just can't seem to think of it!.

[granny grump]

where do you grow then denquiz - iwas kindly helped with this one by mamyalynne

[granny grump]

sorry them/

[denquiz]

Oh, of course, thanks to your clue I now I know what it is, when you think about it is obvious! - many thanks for your help on this, granny grump (and mamyalynne for helping you!)