"Display results with all search words" > change color of text?

Hello All,

In HTML5 output, below the Search box (both the one in the top far right of the screen, and the one in the left navigation pane (pictured below), there is the following text: "Display search words with all search words." 

Can anyone tell me how to change the color of that text?

Also, can I change the wording of that text?

Thanks,

Mark

Here, the text is black, so it's barely visible:

Here, I've simply highlighted the text with my cursor. This is the text whose color I want to change.