office-ui-fabric-react/lib/utilities/color/correctHex.js

Reusable React components for building experiences for Microsoft 365.

import { MIN_HEX_LENGTH, MAX_HEX_LENGTH } from './consts';
/**
 * Corrects a hex color to have length 3 or 6. Defaults to white if too short.
 * Does NOT check anything besides the length (such as valid characters) and does NOT handle
 * hex values starting with # sign.
 */
export function correctHex(hex) {
    if (!hex || hex.length < MIN_HEX_LENGTH) {
        return 'ffffff'; // not a valid color--default to white
    }
    if (hex.length >= MAX_HEX_LENGTH) {
        return hex.substring(0, MAX_HEX_LENGTH);
    }
    return hex.substring(0, MIN_HEX_LENGTH);
}
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