Name the background colour for the Australian Capital Territory
CREATE TABLE "table1_1000181_1" (
  "state_territory" text,
  "text_background_colour" text,
  "format" text,
  "current_slogan" text,
  "current_series" text,
  "notes" text
);
SELECT "text_background_colour" FROM "table1_1000181_1" WHERE "state_territory"='Australian Capital Territory';