penpot/frontend/resources/styles/main/partials/forms.scss

// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
//
// Copyright (c) 2015-2016 Andrey Antukh <niwi@niwi.nz>
// Copyright (c) 2015-2016 Juan de la Cruz <delacruzgarciajuan@gmail.com>

// TODO: juan revisit

input,
select,
textarea {
  &.invalid {
    border-color: red;
    color: red;
  }
}