The stamp was a dark, dull blue colour with a heavy black postmark.

这枚邮票是模糊的暗蓝色的，上面盖着一个粗黑色的邮戳。

《柯林斯英汉双解大词典》

Colour these robots black, please.

请把这些机器人染成黑色。

youdao

It's very deep black cherry colour.

这是深黑樱桃色。

youdao

The former wife of the president, Winnie Madikizela-Mandela, told mourners that if South Africa was a rainbow nation, the rainbow did not appear to include the colour black.

BBC: Mandela warns ghosts of apartheid haunting S Africa

For many photographers it is one or the other, as to shoot in both colour and black and white at the same time is not something that many can achieve.

BBC: Rene Burri in colour

The missing lizard is described as being dark green and black in colour, with around half its length being its tail.

BBC: Black-throated monitor lizard