How to use the netlify-cms-ui-default.colors.errorText function in netlify-cms-ui-default

color: #444a57;
    transition: border-color ${transitions.main};
    position: relative;
    font-size: 15px;
    line-height: 1.5;

    select& {
      text-indent: 14px;
      height: 58px;
    }
  `,
  widgetActive: `
    border-color: ${colors.active};
  `,
  widgetError: `
    border-color: ${colors.errorText};
  `,
};

const ControlContainer = styled.div`
  margin-top: 16px;

  &:first-of-type {
    margin-top: 36px;
  }
`;

const ControlErrorsList = styled.ul`
  list-style-type: none;
  font-size: 12px;
  color: ${colors.errorText};
  margin-bottom: 5px;

font-size: 14px;
  padding: 10px 10px;
  margin-bottom: 15px;
  margin-top: 6px;
  width: 100%;
  position: relative;
  z-index: 1;

  &:focus {
    outline: none;
    box-shadow: inset 0 0 0 2px ${colors.active};
  }
`;

const ErrorMessage = styled.p`
  color: ${colors.errorText};
`;

let component = null;

if (window.netlifyIdentity) {
  window.netlifyIdentity.on('login', user => {
    component && component.handleIdentityLogin(user);
  });
  window.netlifyIdentity.on('logout', () => {
    component && component.handleIdentityLogout();
  });
}

export default class GitGatewayAuthenticationPage extends React.Component {
  constructor(props) {
    super(props);

  color: ${props => (props.error ? colors.errorText : 'inherit')};
  background-color: ${colors.textFieldBorder};

`,
  info: css`
    background-color: ${colors.infoBackground};
    color: ${colors.infoText};
  `,
  success: css`
    background-color: ${colors.successBackground};
    color: ${colors.successText};
  `,
  warning: css`
    background-color: ${colors.warnBackground};
    color: ${colors.warnText};
  `,
  danger: css`
    background-color: ${colors.errorBackground};
    color: ${colors.errorText};
  `,
};

const Toast = ({ kind, message, t }) => (
  <div>
    
    {t(message.key, { details: message.details })}
  </div>
);

Toast.propTypes = {
  kind: PropTypes.oneOf(['info', 'success', 'warning', 'danger']).isRequired,
  message: PropTypes.object,
  t: PropTypes.func.isRequired,
};