import AbstractColumnHelper, { SerializerOrParserFnProps } from '../column.interface';
export declare class ColourHelper extends AbstractColumnHelper {
    columnDefaultMeta: {
        defaultColor: string;
        displayFormat: string;
        swatchStyle: string;
        swatchSize: string;
    };
    /**
     * Serialise a user-supplied value for storage.
     *
     * During bulk paste or search-query serialisation, invalid values are
     * silently dropped (returns `null`).  In all other contexts an invalid
     * value throws a {@link SilentTypeConversionError} so the caller can
     * surface an appropriate message.
     */
    serializeValue(value: any, params: SerializerOrParserFnProps['params']): string | null;
    /** Parse a stored value for display. Returns `null` for invalid values. */
    parseValue(value: any): string | null;
    /** Return a plain-text representation suitable for export / clipboard. */
    parsePlainCellValue(value: any, _params: SerializerOrParserFnProps['params']): string;
}