help/_scss/_callout.scss

.callout {
    padding: 1rem;
    margin: 1rem 0;
    border: 1px solid $border-color;
    border-left-width: 4px;
    border-radius: $border-radius;
    background-color: #fafafa;

    > *:last-child {
        margin-bottom: 0;
    }

    h5 {
        margin-top: 0 !important;
    }

    pre {
      background-color: white;
    }

    &.callout-primary, &.callout-info {
        border-left-color: $primary;

        h5 {
            color: $primary;
        }
    }

    &.callout-default {
        border-left-color: $border-color;

        h5 {
            color: $border-color;
        }
    }

    &.callout-danger {
        border-left-color: $danger;

        h5 {
            color: $danger;
        }
    }

    &.callout-success {
        border-left-color: $success;

        h5 {
            color: $success;
        }
    }

    &.callout-warning {
        border-left-color: $warning;

        h5 {
            color: $warning;
        }
    }
}