世界上为什么没有紫色国旗？

Why is there no purple flag in the world?

因为紫色染料成本太高了！

Because purple dye costs too much!

1800年前，紫色染料比同等重量的黄金还要昂贵。

By 1800, purple dye had been more expensive than gold of the same weight.

几个世纪以来，紫色象征着皇室的身份与地位，曾经伊丽莎白女王还下过一道禁令：非皇室人员不准穿戴紫色服饰！她也是下此禁令的第一人。

For centuries, purple has symbolized the identity and status of the royals. Queen Elizabeth once issued a ban: non royal people are not allowed to wear purple clothes! She was also the first person to impose such a ban.

紫色的珍贵源于其初始染料的稀缺，以及制作成本的高昂。当初，大部分紫色的染料都来自腓尼基的贸易之都提尔（现在的黎巴嫩）。

The value of purple comes from the scarcity and high cost of its initial dyes. At that time, most of the purple dyes came from Tyre (now Lebanon), the trade capital of Phoenicia.

一小磅紫色染料的价格可以买三磅黄金，相当于现在的56000美元。

A small pound of purple dye and three pounds of gold are of the same price, equivalent to the current 56000$.

所以，没有一个国家能够富裕到在国旗上使用紫色。

Therefore, no country can be rich enough to use purple on its national flag.