kidd,
because I rewatched episode 4, I found out something as well. in the first episode of MDWAV2, Jing Jung upon fighting with the vampire models during the fashion show did mentioned the 5 generations of vampires (red, green, orange, grey, white) and MDWAV2 did follow that rule. Eg. Chueng San (RED), Chui Fook (GREEN), Tong Boon Jing (ORANGE), Kam Mei Loy (GREY).
However, in episode 4, Siu Ling explained to Jin Tau that there are 6 generations of vampire : RED, GREEN, YELLOW, BLUE, WHITE, BLACK. Let's say that yellow being amber may be able to pass off as orange but where did "Blue" comes from?
Another mistake by Chan Sap Sam who underestimate how obsessed fans are who can memorize the vampire generations?