Three things guide the choice: temperature, warm or cool; depth, how light or dark you are; and clarity, how soft or bright. All three Autumns lean warm. They split on depth and clarity.
Soft Autumn: golden, blended, never fiery
Soft Autumn leans neutral to warm, sits at medium depth and is very soft. Your hair wants the same gentle blend.
Golden light brown, honey dark blonde and melted caramel all work. Keep the warmth, skip the flame. Highlights stay close to your base, so the whole head reads as one soft color.
A very light blonde or a fiery red breaks that softness.
Warm Autumn: copper, auburn and dark honey
Warm Autumn (also called True Autumn) is the very warm heart of the season, rich and slightly muted. Red, coppery, auburn, golden brown and dark honey all belong here. Warm tones were made for you.
Ash is the shade to watch. It cools the hair and can gray the skin beside it.
Deep Autumn: chocolate, mahogany and deep auburn
Deep Autumn (also called Dark Autumn) is dark, rich and high in contrast. Chocolate brown, dark brown with mahogany or coppery tones, and deep auburn suit it.
A big lightening is the move to leave alone: it takes away the contrast that gives your face its intensity. On you, dark colors give radiance instead of darkening you.