pco/app/uview-ui/components/u-button/nvue.scss

$u-button-active-opacity: 0.75 !default;
$u-button-loading-text-margin-left: 4px !default;
$u-button-text-color: #FFFFFF !default;
$u-button-text-plain-error-color: $u-error !default;
$u-button-text-plain-warning-color: $u-warning !default;
$u-button-text-plain-success-color: $u-success !default;
$u-button-text-plain-info-color: $u-info !default;
$u-button-text-plain-primary-color: $u-primary !default;
.u-button {
  &--active {
    opacity: $u-button-active-opacity;
  }

  &--active--plain {
    background-color: rgb(217, 217, 217);
  }

  &__loading-text {
    margin-left: $u-button-loading-text-margin-left;
  }

  &__text,
  &__loading-text {
    color: $u-button-text-color;
  }

  &__text--plain--error {
    color: $u-button-text-plain-error-color;
  }

  &__text--plain--warning {
    color: $u-button-text-plain-warning-color;
  }

  &__text--plain--success {
    color: $u-button-text-plain-success-color;
  }

  &__text--plain--info {
    color: $u-button-text-plain-info-color;
  }

  &__text--plain--primary {
    color: $u-button-text-plain-primary-color;
  }
}