export interface GlassRgb {
    r: number;
    g: number;
    b: number;
}
export declare const normalizeHexColor: (input: string) => string;
export declare const hexToRgb: (input: string) => GlassRgb;
export declare const rgbToHex: ({ r, g, b }: GlassRgb) => string;
export declare const mixHex: (from: string, to: string, amount: number) => string;
export declare const relativeLuminance: (input: string) => number;
export declare const contrastRatio: (foreground: string, background: string) => number;
export declare const bestTextColor: (background: string, light?: string, dark?: string) => string;
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