import { type IColor, type IColorPalette, type IColorPaletteItem, type IRgbColorValue } from "@gooddata/sdk-model";
import { type DataViewFacade, type IHeaderPredicate, type IMappingHeader } from "@gooddata/sdk-ui";
import { type IColorMapping, type IPatternObject } from "./types.js";
/**
 * @internal
 */
export declare function getRgbFromWebColor(input: string): IRgbColorValue | null;
/**
 * @internal
 */
export declare function parseRGBColorCode(color: string): {
    R: number;
    G: number;
    B: number;
};
/**
 * Source:
 *     http://stackoverflow.com/questions/5560248/programmatically-lighten-or-darken-a-hex-color-or-rgb-and-blend-colors
 *
 * @internal
 */
export declare function getLighterColor(color: string, percent: number): string;
/**
 * Darkens a rgb() color by the given percent (0..1).
 * It uses the reverse algorithm of getLighterColor (color made lighter by it can be negated).
 * @internal
 */
export declare function getDarkerColor(color: string, percent: number): string;
/**
 * @internal
 */
export declare function getLighterColorFromRGB(color: IRgbColorValue, percent: number): IRgbColorValue;
/**
 * @internal
 */
export declare function normalizeColorToRGB(color: string): string;
/**
 * @internal
 */
export declare function getColorPaletteFromColors(colors: string[]): IColorPalette;
/**
 * @internal
 */
export declare function getRgbString(color: IColorPaletteItem): string;
/**
 * @internal
 */
export declare function isCustomPalette(palette: IColorPalette): boolean;
/**
 * @internal
 */
export declare function getColorFromMapping(mappingHeader: IMappingHeader, colorMapping: IColorMapping[] | undefined, dv: DataViewFacade): IColor | undefined;
/**
 * Compares two GUID strings, normalizing purely-numeric GUIDs so that
 * zero-padded values match their unpadded counterparts (e.g. "05" matches "5").
 *
 * IDE (YAML) deployments may store palette GUIDs with zero-padding while the
 * runtime palette uses unpadded indices.  Without this normalization the
 * strict-equality check fails for IDs below 10 and `isValidMappedColor`
 * rejects the stored color, causing the configuration to be reset.
 *
 * @internal
 */
export declare function guidEquals(a: string, b: string): boolean;
/**
 * @internal
 */
export declare function getColorByGuid(colorPalette: IColorPalette, guid: string, index: number): IRgbColorValue;
/**
 * @internal
 */
export declare function getRgbStringFromRGB(color: IRgbColorValue): string;
/**
 * @internal
 */
export declare function parseRGBString(color: string): IRgbColorValue | null;
/**
 * Computes WCAG contrast ratio between two colors.
 * Accepts any web color supported by `getRgbFromWebColor` (hex, rgb/rgba, named colors).
 *
 * @internal
 */
export declare function getContrastRatio(colorA: string, colorB: string): number;
/**
 * Creates new predicate for mapping colors to chart entities:
 *
 * -  if attribute header, URI is expected to match testValue
 * -  otherwise (attr or measure descriptor) expecting local identifier match
 *
 * @param testValue - right hand side to test against
 * @public
 */
export declare function getColorMappingPredicate(testValue: string): IHeaderPredicate;
/**
 * Applies color properties preferences. If palette is specified and non-empty, it is returned. Otherwise
 * non-empty colors are transformed into a palette and returned. If all else fails, default color palette
 * is returned
 *
 * @internal
 */
export declare function getValidColorPalette(colors?: string[], colorPalette?: IColorPalette): IColorPalette;
/**
 * @internal
 */
export declare const ColorUtils: {
    getColorByGuid: typeof getColorByGuid;
    getColorMappingPredicate: typeof getColorMappingPredicate;
};
/**
 * Test whether the color is a pattern object.
 * @param color - tested color object
 *
 * @internal
 */
export declare function isPatternObject(color: string | IPatternObject | undefined): color is IPatternObject;
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