/**
 * Validate colour name.
 * - Allowed characters: letters, numbers, spaces, underscores, and hyphens.
 * - Min length: 2 characters.
 * - Max length: 20 characters.
 *
 * @param colourName Colour name string to validate.
 * @getters getResult(), getColourName(), hasErrors(), getErrorsList()
 * @result string or null
 */
export default class ValidateColourName {
    private result;
    private errors;
    private errmsg;
    private colourName;
    constructor(colourName: string);
    get getResult(): string | null;
    get getColourName(): string;
    get hasErrors(): boolean;
    get getErrorsList(): string[];
    private addError;
    private setErrorState;
    private showErrors;
    private isLenTooLong;
    private isLenTooShort;
}