If we're performing a job that requires accuracy and focus (say, copy editing a manuscript), we should seek out confined spaces with a red color scheme.

WSJ: Jonah Lehrer on Buildings, Health and Creativity | Head Case

Four were destroyed or were used to improve the current manuscript, which is therefore the only extant copy of the Deed.

UNESCO: Memory of the World

Or at least that's the story being plugged by the historical manuscript dealer who is selling the only handwritten copy of the poem in private hands.

FORBES: Magazine Article