Dudas con el ColorFul or ColorField

#---------------------settings/base.py-----------------------------------
# ---DESPUES DE HACER EL PIP INSTALL TANTO COLORFUL Y COLORFIELD---------
#----- LO AGREGUE EN INSTALLED_APPS, DESPUES DE ESTO LE HICE-------------
#------ ./manage.py collectstatic ---------------------------------------
#------ y con esto pense que ya podia usarlo en el forms/__init__py------
"""
Django settings for pac_gateway project.

Generated by 'django-admin startproject' using Django 1.9.5.

For more information on this file, see
https://docs.djangoproject.com/en/1.9/topics/settings/

For the full list of settings and their values, see
https://docs.djangoproject.com/en/1.9/ref/settings/
"""

import os

DEBUG = False

if os.environ.get('DJANGO_DEBUG', False):
    DEBUG = True

# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

# Quick-start development settings - unsuitable for production
# See https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/

# SECURITY WARNING: keep the secret key used in production secret!
SECRET_KEY = 'nbqoc-^@f#1(g#cux^w*$%14opecsr8np@m^h2vykctm+76!pw'

ALLOWED_HOSTS = []

# Application definition

INSTALLED_APPS = [
    'django.contrib.admin',
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'django.contrib.postgres',
    'rest_framework.authtoken',
    'rest_framework',
    'corsheaders',
    'rest_framework_swagger',
    'anymail',
    'pac_gateway.cfd',
    'daterange_filter',
    'colorfield',
    'colorful',
]

# INSTALLED_APPS.append('colorful'),

MIDDLEWARE_CLASSES = [
    'django.middleware.security.SecurityMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'corsheaders.middleware.CorsMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',
]

CORS_ORIGIN_ALLOW_ALL = True
CORS_ALLOW_CREDENTIALS = True

ROOT_URLCONF = 'pac_gateway.urls'

TEMPLATES = [
    {
        'BACKEND': 'django.template.backends.django.DjangoTemplates',
        'DIRS': [os.path.join(BASE_DIR, 'templates'), ],
        'APP_DIRS': True,
        'OPTIONS': {
            'context_processors': [
                'django.template.context_processors.debug',
                'django.template.context_processors.request',
                'django.contrib.auth.context_processors.auth',
                'django.contrib.messages.context_processors.messages',
            ],
            'debug': DEBUG
        },
    },
]

WSGI_APPLICATION = 'pac_gateway.wsgi.application'

# Password validation
# https://docs.djangoproject.com/en/1.9/ref/settings/#auth-password-validators

AUTH_PASSWORD_VALIDATORS = [
    {
        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
    },
    {
        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
    },
]

# Internationalization
# https://docs.djangoproject.com/en/1.9/topics/i18n/

LANGUAGE_CODE = 'es'

TIME_ZONE = 'UTC'

USE_I18N = True

# USE_L10N = True

USE_TZ = True

LOCALE_PATHS = (
    os.path.join(BASE_DIR, 'locale'),
)

# Static files (CSS, JavaScript, Images)
# https://docs.djangoproject.com/en/1.9/howto/static-files/

STATIC_URL = '/static/'
STATIC_ROOT = os.path.join(BASE_DIR, 'static')

# Rest Framework

REST_FRAMEWORK = {
    'DEFAULT_PERMISSION_CLASSES': (
        'rest_framework.permissions.IsAuthenticated',
    ),
    'DEFAULT_FILTER_BACKENDS': (
        'rest_framework.filters.DjangoFilterBackend',
        'rest_framework.filters.SearchFilter'
    ),
    'DEFAULT_AUTHENTICATION_CLASSES': (
        'rest_framework.authentication.SessionAuthentication',
        'rest_framework.authentication.TokenAuthentication'
    ),
    'DEFAULT_PAGINATION_CLASS': (
        'rest_framework.pagination.LimitOffsetPagination'
    )
}

LOGIN_REDIRECT_URL = "/api/docs/"

# PAC Gateway setup
CFDI_DEFAULT_VERSION = '3.2'
CFDI_IR_SCHEMA_PATH = os.path.join(BASE_DIR, 'share', 'schemas',
                                   'comprobante.json')

PAC_GATEWAY_ENCRYPTION_KEY = os.environ.get('PAC_GATEWAY_ENCRYPTION_KEY', '')

FINKOK_USERNAME = os.environ.get('FINKOK_USERNAME', '')
FINKOK_PASSWORD = os.environ.get('FINKOK_PASSWORD', '')

PAC_GATEWAY_AVAIL_SHEETS_WARNING_PCT = 0.125

PAC_GATEWAY_DEFAULT_CERTIFICATION_DAYS = 3

PAC_GATEWAY_FROM_EMAIL = "support@f-ambit.mx"

# SAT Formats
SAT_DATE_FORMAT = '%Y-%m-%dT%H:%M:%S'

# Default prefixes
PAC_GATEWAY_DEFAULT_GLOBAL_INVOICE_PREFIX = 'FG'
PAC_GATEWAY_DEFAULT_GLOBAL_CREDIT_NOTE_PREFIX = 'NCG'
PAC_GATEWAY_DEFAULT_CREDIT_NOTE_PREFIX = 'NC'

# Payment form strings
PAC_GATEWAY_PAYMENT_FORM_SINGLE = 'Pago en una sola exhibición'
PAC_GATEWAY_PAYMENT_FORM_MULTIPLE = 'Parcialidad {part} de {total_parts}'

# Invoice defaults
PAC_GATEWAY_DEFAULT_SAT_PAYMENT_METHOD = '01'
PAC_GATEWAY_DEFAULT_UNIT = 'Unidad'

PAC_GATEWAY_INSTALLED_APPS = {
    'lightspeed-retail': ('pac_gateway.applications.lightspeed'
                          '.retail.LightSpeedRetailHandler')
}

DEFAULT_PAF_CONFIG = {
    'palette': {
        'bg': '#F9F9F9',
        'header_bg': '#FDFDFD',
        'container_bg': '#FFFFFF',
        'title_bg': '#E31818',
        'form_footer_bg': '#F5F5F5',
        'footer_bg': '#FDFDFD',
        'primary_button_bg': '#E31818',
        'secondary_button_bg': '#A0A0A0',
        'font_color': '#838383',
        'title_color': '#FFFFFF',
        'link_color': '#337AB7',
        'primary_button_color': '#FFFFFF',
        'secondary_button_color': '#FFFFFF',
        'form_footer_color': '#838383',
        'footer_color': '#838383'
    }
}

# Invoice PDF setup

INVOICE_PDF_PAGESIZE = 'letter'
INVOICE_PDF_ORIENTATION = 'portrait'
INVOICE_PDF_MARGIN = '1cm'
INVOICE_PDF_PADDING = '0'

# Swagger settings
SWAGGER_SETTINGS = {
    'api_version': '0.1',
    'api_path': '/api/v1/',
    'enabled_methods': [
        'get',
        'post',
    ],
    'is_authenticated': True,
    'permission_denied_handler': 'pac_gateway.cfd.views.permission_denied_handler',
    'info': {
        'contact': 'team@uakami.com',
        'description': 'API Pac Gateway to search, claim and stamp invoices. ',
        # 'license': 'Apache 2.0',
        # 'licenseUrl': 'http://www.apache.org/licenses/LICENSE-2.0.html',
        # 'termsOfServiceUrl': 'http://helloreverb.com/terms/',
        'title': 'Ambit - API Pac Gateway',
    }
}

# Anymail settings
ANYMAIL = {
    "MAILGUN_API_KEY": os.environ.get('MAILGUN_API_KEY', None)
}

EMAIL_BACKEND = "anymail.backends.mailgun.MailgunBackend"
DEFAULT_FROM_EMAIL = "no-reply@f-ambit.mx"

#---------------------forms/__init__.py-----------------------------------
#---------------AQUI ES DONDE QUIERO USARLO-------------------------------

# from colorful.fields import RGBColorField
# from  colorful.fields import  RGBColorField
# from colorfield.fields import ColorField
from django import forms
from django.contrib.admin.widgets import AdminSplitDateTime
from django.utils.translation import ugettext_lazy as _

from pac_gateway.cfd.models import CFD
from pac_gateway.cfd.models import OrganizationCertificate
from .fields import ColorField


class OrganizationCertificateForm(forms.ModelForm):
    pwd = forms.CharField(
        max_length=64,
        label=_('Certificate Password'),
        help_text=_('Only for setting the password'),
        required=False,
        widget=forms.PasswordInput
    )

    def save(self, *args, **kwargs):
        self.instance.pwd = self.cleaned_data['pwd']
        return super(OrganizationCertificateForm, self).save(*args, **kwargs)

    class Meta:
        model = OrganizationCertificate
        fields = ('der_certificate', 'der_key',
                  'pwd',)


class PAFConfigForm(forms.Form):
    # Backgrounds
    bg = ColorField(
        label=_('Main Background'),
        required=False,
    )
    header_bg = ColorField(
        label=_('Header Background'),
        required=False,
    )
    container_bg = ColorField(
        label=_('Container bg'),
        required=False,
    )
    title_bg = ColorField(
        label=_('Title bg'),
        required=False,
    )
    footer_bg = ColorField(
        label=_('Footer bg'),
        required=False,
    )
    form_footer_bg = ColorField(
        label=_('Form footer bg'),
        required=False,
    )
    primary_button_bg = ColorField(
        label=_('Primary btn bg'),
        required=False,
    )
    secondary_button_bg = ColorField(
        label=_('Secondary btn bg'),
        required=False,
    )

    # Font colors
    font_color = ColorField(
        label=('Font color'),
        required=False,
    )
    title_color = ColorField(
        label=_('Title color'),
        required=False,
    )
    link_color = ColorField(
        label=_('Link color'),
        required=False,
    )
    primary_button_color = ColorField(
        label=_('Primary btn color'),
        required=False,
    )
    secondary_button_color = ColorField(
        label=_('secondary btn color'),
        required=False,
    )
    form_footer_color = ColorField(required=False)
    footer_color = ColorField(required=False)

    # Images
    logo = forms.CharField(
        label=_('Image: Logo (250x125)'),
        required=False
    )

    # URLs and contact
    website_url = forms.URLField(
        label=_('Website Url'),
        required=False
    )
    email = forms.EmailField(
        label=_('Email')
    )
    phone_number = forms.CharField(
        label=_('Phone Number')
    )

    # Copies
    claiming_period_text = forms.CharField(
        required=False,
        widget=forms.Textarea,
        label=_('Claim')
    )
    support_text = forms.CharField(
        required=False,
        widget=forms.Textarea,
        label=_('Support')
    )


class AllocateTaxSheetsForm(forms.Form):
    sheets = forms.IntegerField(
        label=_('Number of sheets'),
        help_text=_(
            'Total number of tax sheets to allocate for the organization'
        ),
    )


class ClosingDateForm(forms.Form):
    CLASS_GLOBAL_CHOICES = (
        (CFD.CLASS_GLOBAL_INVOICE, _('Global Invoice')),
        (CFD.CLASS_GLOBAL_CREDIT_NOTE, _('Global Credit Note'))
    )

    invoice_class = forms.ChoiceField(
        choices=CLASS_GLOBAL_CHOICES,
        initial=CFD.CLASS_GLOBAL_INVOICE,
        help_text=_('Class of the global invoice'),
        label=_('Global invoice class')
    )

    date = forms.SplitDateTimeField(
        label=_('Closing date and time'),
        help_text=_(
            'Date and time for the closing of the global invoice or credit note'
        ),
        widget=AdminSplitDateTime
    )