isHexColor incorrectly validates hex colors without #

[mag123c]

The isHexColor function in validator.js currently allows strings like "6633FF" to pass validation as a valid hex color, even though a proper hex color should include a leading #. This issue arises from the current regex implementation in the library.

https://github.com/validatorjs/validator.js/blob/master/src/lib/isHexColor.js

Is allowing hex colors without # an intended behavior in isHexColor? If not, can I submit a fix?