import { RGBColor, HSLColor } from '../types/color';
export declare function hexToRgb(hex: string): RGBColor;
export declare function rgbToHex(r: number, g: number, b: number): string;
export declare function rgbToHsl(rgb: RGBColor): HSLColor;
export declare function hslToRgb(hsl: HSLColor): RGBColor;
/** Apply luminance modulation (lumMod) — OOXML percentage (e.g. 75000 = 75%) */
export declare function applyLumMod(hsl: HSLColor, lumMod: number): HSLColor;
/** Apply luminance offset (lumOff) — OOXML percentage */
export declare function applyLumOff(hsl: HSLColor, lumOff: number): HSLColor;
/** Apply tint: move luminance toward white */
export declare function applyTint(hsl: HSLColor, tint: number): HSLColor;
/** Apply shade: move luminance toward black */
export declare function applyShade(hsl: HSLColor, shade: number): HSLColor;
/** Apply saturation modulation */
export declare function applySatMod(hsl: HSLColor, satMod: number): HSLColor;
/** Apply saturation offset */
export declare function applySatOff(hsl: HSLColor, satOff: number): HSLColor;
/** Clamp a value to [min, max] */
export declare function clampColor(val: number): number;
/** Well-known preset colors (subset) */
export declare const PRESET_COLORS: Record<string, string>;
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