#FF5A22 Hex Color

Try deep teal or charcoal, both cool the heat of #ff5a22 without dulling it. Cream works too if you want the color to stay loud. Avoid yellow and pink, which tip it toward carnival.

Black text. It hits about 6.7:1 contrast against #ff5a22, which passes WCAG AA for body text. White falls short, so keep it to large display type if you use it at all.