Gives it a nice sort of dark, rich colour.

使它呈现出一种漂亮、丰富的深颜色。

You'd get that rich colour from the shells of the prawns.

虾壳的颜色会很鲜艳。

And that oyster sauce is gonna create a really lovely, salty, umami flavour to the skin of the turkey and give it a really rich, dark colour.

蚝油会给火鸡的外皮带来一种非常美味的、咸的、鲜味的味道，让它的颜色更加丰富、深沉。