Why did the emperor's belt change from white to red?

In the setting of King Kamen Rider, Tiki gained the power of a knight in the new decade. His belt was upgraded to a driver in the new decade, and his color changed from white to magenta.

Kamen Rider, the protagonist in the Japanese special drama Ten Years. The basic tone is magenta, and the compound eye color is green. Signs are similar to bar codes. Known as "destroying the existence of all knights", "destroyer of all things", "destroyer of the world", "devil" and so on.

Kamen Rider series is a series of Japanese special heroic stories produced by Toyo Co., Ltd. and adapted from Shotaro Ishinomori's original works. By 2020, * * * will have 39 leading knights (excluding reset series and accident series).

Masquerade Knight Series is a special TV series with Shotaro Ishinomori as the original and produced by Dongying, which was launched by 197 1. Kamen Rider, the first film in this series, was broadcast on April 3rd 197 1, which was loved by audiences of all ages and inspired more follow-up works by Kamen Rider.