The answer is: Blue and white

Esther 8:15

In the dramatic conclusion of the Book of Esther, the wardrobe of Mordecai serves more than just a fashion statement; it embodies royal authority, honor, and the transformation of status. When Mordecai dons blue and white apparel, it is not merely a stylistic choice but a vivid representation of his ascension from mourning in sackcloth to being esteemed in the royal high court.

Historians and Biblical scholars often point out that the color blue in ancient cultures was symbolic of purity and heavenliness. Some even connect it to the divine, as it featured prominently in the Temple's design and the robes of priests. White, on the other hand, denotes purity, righteousness, and new beginnings—key themes surrounding Mordecai's pivotal role in safeguarding the Jewish people.

For added trivia, it’s interesting to note that other versions of the royal wardrobe also highlight these colors in various cultures. In classical Roman attire, white toga was worn on the more elevated occasions of public life, suggesting that the symbolism of colors transgresses borders and blurs time.

Mordecai's narrative doesn't just end with royal clothes; it’s also before Esther urges that he wear garments befitting his new stature following the decree’s reversal. From this image, we see that in storybook endings fit for a crown, there is hope and confirmation of a revival. A movement not just for nations but personal redemption we all seek in life.