app/addons/components/assets/scss/toolbarbutton.scss

// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
//   http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.

.toolbar-btn {
  background-color: transparent;
  border-color: $cf-border-color01;
  border-width: 1px;
  border-style: solid;
  color: $cf-text-fonticon01;
  border-radius: $cf-border-radius;
  &:hover {
    background-color: $cf-brand-hightlight-hover;
    border-color: $cf-brand-hightlight-hover;
    color: $cf-text02;
    &:disabled {
      background-color: transparent;
      border-color: $cf-border-color01;
      color: $cf-text01-muted;
    }
  }
  &:focus {
    box-shadow: 0 0 0 0.15rem $cf-brand-hightlight-hover;
    border-color: $cf-brand-hightlight-hover;
  }
  &:disabled {
    color: $cf-text01-muted;
  }
}