Django form: visibly group or separate fields

Question

I have a form that I'm displaying within a Django app. This form has a number of fields.

To make the UI more intuitive, I would like to display the fields not simply one after the other, but instead grouped into sections - be it within a box or by separating the sections with a horizontal line or larger spacing or custom text etc.

My main interest is having the subgroups visibly separated from each other. Being able to use some text (basically a label without an attached field) as section devider would be a welcome bonus.

How can I achieve this?

Current example code:

forms.py:

from django import forms

class MyForm(forms.Form):
    color1 = forms.CharField()
    items_color1 = forms.CharField()
    # some devider here
    color2 = forms.CharField()
    items_color2 = forms.CharField()

mypage.html:

<table>
  {{ form.as_table }}
  <tr>
    <td>&nbsp;</td>
    <td><input type="submit" value="Submit" id="form_field" name="submit_btn"></td>
  </tr>
</table>

(I'm pretty new to Django. My previous GUI experience is mainly with PyQt5.)