/** RGBA tuple in 0–1 range, suitable for GPU uniform/vertex data. */
export type Color4 = [number, number, number, number];
/**
 * Parse a CSS color string into an RGBA float4 tuple.
 *
 * Supported formats:
 *   - #RGB, #RRGGBB, #RRGGBBAA
 *   - rgb(r, g, b), rgba(r, g, b, a)
 *   - Named colors (transparent, black, white, red, green, blue)
 *
 * Throws on unsupported formats — fail fast, never silently return a default.
 */
export declare function parseCssColor(css: string): Color4;
/** Clear the parse cache (useful for tests). */
export declare function clearColorCache(): void;