chromium/third_party/blink/renderer/core/html/resources/stylable_select_forced_colors.css

/* Copyright 2024 The Chromium Authors
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 *
 * The default style sheet used to render <select> when the StylableSelect
 * feature is enabled and the forced colors are enabled. It can be merged into
 * forced_colors.css when StylableSelect is enabled and the flag is removed.
 */

select {
  background-color: -internal-appearance-auto-base-select(Canvas, transparent);
}