the red, yellow and white chef? as I remember...
Close. When the show was first introduced to viewers here in N.America, the show had this lineup:
FROM LEFT TO RIGHT
a) GREEN, WHITE & RED: Iron Chef Italian - Kobe Masahiko
b) YELLOW: Iron Chef Chinese - Chen Kenichi
c) SILVER: Iron Chef Japanese - Morimoto Masaharu
d) RED: Iron Chef French - Sakai Hiroyuki
Later on, western audiences learned that there had been other seasons of the show that happened prior to the ones that we had been first introduced to, and that with those earlier seasons, there were other chefs who had previously/formerly held the titles of "Iron Chef" (seen in the following picture showing all the Iron Chefs seen in the series).
a) GREEN - Iron Chef French (I) - Ishinabe Yutaka
b) BLUE - Iron Chef Japanese (I) - Michiba Rokusaburo
c) PURPLE - Iron Chef Japanese (II) - Nakamura Koumei