Read this passage from FDR's First Inaugural Address. Which words and phrases show the best examples of colorful language?
We face the arduous days that lie before us in the warm courage of the national unity; with the clear consciousness of seeking old and precious moral
values; with the clean satisfaction that comes from the stern performance of duty by old and young alike. We aim at the assurance of a rounded and
permanent national life.
By old and young alike
Old and precious moral values
We aim at the assurance
We face the arduous days
Pleaseeee helpppp

"Colorful language" is a way of adding a color or kick to the words and phrases in a sentence. This livens up any writing thus allowing the listeners or readers to imagine what you are saying. It simply tickles their senses. By stating "We face the arduous days," FDR is able to express how tiring and exhausting people were because of the Great Depression. Describing the situation as "arduous" makes the phrase colorful and well-timed for it is exactly what FDR wanted people to imagine.

So, this explains the answer.