is the black or white

Often the solution is a "third way", something between either/or, black and white.

通常，解决办法是第三条出路，介于是或不是，黑或者白之间。

White/black (or dark gray) is the typical color scheme of minimalist Web designs, but others use different colors to achieve the same goals.

白色/黑色（或深灰色）是极简网站设计中典型的配色方案，但也有人使用不同的颜色来达到同样的目标。

When the light is on, or white, the image is visible. When the light is off, or black, the layer can't be seen.

当在灯光下或白天，图像是可见的。当在灯熄或黑夜下，图像时不能被看见的。