/**
 * Relay's terminal palette: Relay blue (#0A84FF) for the wordmark, the active
 * option, the spinner and the check; dim for hints and paths; red for errors.
 * No other hue anywhere (owner ruling, _artifacts/cli-connect-design-20260912.md,
 * item 7).
 *
 * Whether colour is painted at all is decided from an environment handed in,
 * never from a library's process-wide guess, so a test can decide it too. The
 * order is picocolors' (src/index.js): NO_COLOR wins, then FORCE_COLOR, then a
 * terminal that is not `dumb`. The depth is supports-color's: FORCE_COLOR=3 or
 * COLORTERM=truecolor|24bit paints 24-bit, anything else the 256-colour cube.
 */
export type ColourDepth = "none" | "256" | "truecolor";
export interface ColourInput {
    env: NodeJS.ProcessEnv;
    /** Whether the stream the text goes to is a terminal. */
    isTTY: boolean;
}
export declare const colourDepth: ({ env, isTTY }: ColourInput) => ColourDepth;
export interface Palette {
    depth: ColourDepth;
    blue(value: string): string;
    dim(value: string): string;
    red(value: string): string;
    underline(value: string): string;
    /** The cursor block a placeholder starts with, the way clack draws it. */
    inverse(value: string): string;
}
export declare const palette: (input: ColourInput) => Palette;
/** The prompts and the steps go to stderr, so that stream decides for the process. */
export declare const processPalette: () => Palette;
export declare const relayBlue: (value: string) => string;
export declare const dim: (value: string) => string;
export declare const error: (value: string) => string;
export declare const handle: (value: string) => string;
export declare const link: (value: string) => string;
export declare const active: (value: string) => string;
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