BLUEST

Of the colour blue.

Example: "The deep blue sea"

Depressed, melancholic, sad.

Pale, without redness or glare; said of a flame.

Example: "The candle burns blue."

Supportive of, run by (a member of), pertaining to, or dominated by a political party represented by the colour blue.

Of the higher-frequency region of the part of the electromagnetic spectrum which is relevant in the specific observation.

(of steak) extra rare; left very raw and cold.

(of a dog or cat) having a coat of fur of a slaty gray shade.

Severe or overly strict in morals; gloomy.

Example: "Blue and sour religionists;  blue laws"

(of women) literary; bluestockinged.

Having a color charge of blue.

(entertainment) risque or obscene

Example: "His material is too blue for prime-time"