import type { ChartOptions, ChartType, ScriptableContext } from 'chart.js';
export declare const flatColors: (ctx: ScriptableContext<ChartType>) => string;
export declare const opaqueColors: (ctx: ScriptableContext<ChartType>) => string;
export declare const opaqueColors2: (ctx: ScriptableContext<ChartType>) => string;
export declare const opaqueColors7: (ctx: ScriptableContext<ChartType>) => string;
export declare const getFlatColor: (idx: number) => string;
export declare const getGradientColor: (context: {
    chart: {
        ctx: any;
        chartArea: any;
    };
}, idx: number) => {
    addColorStop: (arg0: number, arg1: string) => void;
} | null | undefined;
export declare const getOpaqueGradientColor: (context: ScriptableContext<ChartType>, idx: number, endColor?: string | undefined) => any;
export declare const gradientColors: (ctx: ScriptableContext<ChartType>) => {
    addColorStop: (arg0: number, arg1: string) => void;
} | null | undefined;
export declare const radialGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueDarkGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueLightGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueRadialGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueDarkRadialGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const opaqueLightRadialGradientColors: (ctx: ScriptableContext<ChartType>) => any;
export declare const getChartDefaultOptions: (type: 'bar' | 'bubble' | 'donut' | 'line' | 'pie' | 'polar' | 'radar' | 'scatter' | 'custom' | '') => ChartOptions;
export declare const CHART_COLORS: string[];
export declare const CHART_GRADIENTS: {
    offset: number;
    color: string;
}[][];
export declare const CHART_COLOR_OPAQUE_1: string[];
export declare const CHART_COLOR_OPAQUE_2: string[];
export declare const CHART_COLOR_OPAQUE_7: string[];