So I've wrote them obviously with font color black, so I could see what I was doing.

所以它们我是用黑色字体写的，这样我就可以看到我写的内容。

And the cool thing is I've written the answers in column B, but I have colored them in in font color white.

最酷的是，我把答案写在 B 栏，但我用的是白色字体。

When reading a passage on a computer screen, try highlighting the text in a dark color and changing the font color to white.

当你在电脑屏幕上阅读文章时，试着用一个暗颜色来显示文本，把字体的颜色换成白色。