quay/static/css/directives/ui/signup-form.css

.signup-form-element {
  position: relative;
}

.signup-form-element .co-alert {
  color: black;
}

.signup-form-element .single-sign-on a {
    font-size: 24px;
}

.signup-form-element .single-sign-on .external-login-button i.fa,
.signup-form-element .single-sign-on .external-login-button img {
    width: 30px;
    font-size: 24px;
}