import { TextSchema, type TextSchemaOptions } from "./TextSchema.js";
/**
 * Define a valid color hex string, e.g `#00CCFF`
 *
 * Ensures value is a string, enforces that the string is a valid Color.
 * Checks Color scheme against a whitelist (always), and checks Color domain against a whitelist (optional).
 * `null` is also a valid value if this field is not required.
 *
 * Colors are limited to 512 characters (this can be changed with `max`), but generally these won't be data: URIs so this is a reasonable limit.
 */
export declare class ColorSchema extends TextSchema {
    constructor({ title, value, ...options }: Omit<TextSchemaOptions, "type" | "min" | "max" | "multiline" | "match">);
    sanitize(insaneString: string): string;
}
/** Valid color hex string, e.g. `#00CCFF` (required because empty string is invalid). */
export declare const COLOR: ColorSchema;
/** Valid color hex string, e.g. `#00CCFF`, or `null` */
export declare const OPTIONAL_COLOR: import("./OptionalSchema.js").OptionalSchema<string>;