What is the house colour associated with the house name of Kupe?
CREATE TABLE "whanau_house_system" (
  "house_name" text,
  "house_mascot" text,
  "house_colour" text,
  "year_opened" real,
  "house_leader" text
);
SELECT "house_colour" FROM "whanau_house_system" WHERE "house_name"='Kupe';