This is because the aura colour will be changed by the aura of the coloured background or unnatural light.

这是因为气场的颜色会因为气场的背景颜色或非自然光色下发生了变化。

youdao

One button can adjust the width; one, the height; and one, the background colour.

一个按钮用来调整宽度，一个用来调整高度；还有一个用来调整背景颜色。

youdao

It isn't just lizards that can use colour to blend into the background the spidery world also has many 8-legged chameleons including the four spot orb weaver and the crab spider.

并不是只有变色龙能利用颜色来隐入背景，在蜘蛛的世界里也存在着许多8条腿的变色龙，比如四点圆蛛和蟹蛛。

youdao

Rather than indicating hair colour, educational background or height, suitors tick boxes indicating geographical or industrial desires.

ECONOMIST: Matches made in heaven

His biggest innovation was to change the background colour.

ECONOMIST: Roman Opalka

This pattern of digging for information, background and colour went on till late each evening.

BBC: By BBC News Online's Bob Eggington