It is found that the karpas (a vegetable used in the Passover Seder) symbolizes exile. Therefore, at Ahasuerus's banquet, karpas was among the various colorful items displayed in honor of the feast, as Ahasuerus held the banquet to celebrate that the Jews would not be redeemed anymore (Megillah 11b). Consequently, when Mordechai emerged from the king after God's salvation, he wore all the garments that were displayed at Ahasuerus's banquet, due to the concept of "it was turned to the contrary" (Esther 9:1), which means everything was turned for the good. However, he did not wear the karpas, as it is a clear symbol of exile.

Regarding the phrase "The rose of Jacob was cheerful and glad when they saw Mordechai in blue," it can be interpreted that this garment symbolizes the revelation of heavenly honor and supreme kingship, which brings joy. This is the opposite of the hidden face of God that they had previously experienced, and it is a symbol of their salvation, as it is written immediately afterward: "Your salvation was everlasting." As it is stated (Esther 8:16), "The Jews had light and gladness."