Whenever I see the colours chocolate brown and forest green together, in any context, that makes me think of the taste and mouth-feel of chocolate with mint brittle or mint cracknel, as exemplified by the Peppermint Crisp bar:
Whenever I see the colours forest green and white together, in any context, I think of Kool Mints which I believe were produced in those colours when I was a child. I can even get this effect through grapheme-colour synaesthesia triggered by numbers. For example, the street number of a house that I once lived in evokes the concept of Kool Mints.
Whenever is see one of those cute, rounded, new but retro-styled cars with perfect glossy paint in a brownish tint, it makes me think of flavoured rice-cream or some other flavoured milky desert in the applicable flavour for the colour, such as caramel ricecream, coffee cream desert, chocolate ricecream etc.
On the odd occasion when I’m near a helicopter and hear its engine at close range, or hear one operating under a load, that sound makes me think of the uniquely wonderful smell of a steak and onion pie.