black and orange might b the classic Halloween colors but let us not forget purple and pale turquoise they are 100% as ghastly and ghoulish
The thing is the colors of Halloween are all of the colors. You’ll see Halloween promotions like “we made our milkshakes GREEN!!! Spooky!!” or entire product lines where it’s all red because that’s like gothic vampire stuff or devilish. Blue motifs for haunted mansions, white ghosts and bones and ivory, pink guts and blob monsters, Halloween just celebrates every possible color palette and aesthetic.