Using a style to display text

[StephaneBarbin]

Hi,
new to Manim. I created a script that basically writes text like a type-writer effect. Everything works perfectly well, except for one detail.
The text that displays is on a rounded corner rectangle of a certain color, which seems to change, depending on the style I'm using. I cannot seem to be able to, either, not put a colored rectangle that encompass the text, or to at least put it totally black, same color as the background of the entire rest of the space in the video animation.

In my code, I'm using "monokai" but it seems I cannot use other style without getting an error that looks like this: ValueError: Color #xxx; f not found (where xxx is of course different, depending on which style I'm trying)

So what I'm trying to do is: either being able to just not have a colored rectangle behind the text, or being able to find a style that would actually have a black background, or litterally being able to use a style, but force its color value (of that particular "rectangle" thing) to be black.

I thought background_color = "#000000" would do it but apparently not.

Here is my script:

from pathlib import Path
from pygments.styles import get_style_by_name
from pygments.style import Style
from pygments.token import Keyword, Name, Comment, String, Error, Number, Operator, Generic

# Resolution
config.renderer = "opengl"
config.pixel_width = 1920
config.pixel_height = 1080
config.frame_width = 16.0
config.frame_height = 9.0

class CodeTyping(Scene):
    def construct(self):
        media_folder = Path('F:/_python/manim_test')  
        media_folder.mkdir(parents=True, exist_ok=True)
        config.media_dir = str(media_folder)

        print("Renderer in use:", config.renderer)
        print("Pixel dimensions:", config.pixel_width, "x", config.pixel_height)

        # The Code to be displayed
        code_text = """
                    def add(a, b):
                        # Function to add two numbers
                        result = a + b
                        return result

                    # Main program
                    if __name__ == "__main__":
                        num1 = 10
                        num2 = 20
                        print(f"Adding {num1} and {num2}: {add(num1, num2)}")
                    """

        # mobject
        highlighted_code = Code(
                                code=code_text,
                                tab_width=4,
                                language="python",
                                font="Consolas",
                                background_stroke_width=0,
                                background_stroke_color=BLACK,
                                insert_line_no=False,
                                style="monokai",
                                background="rectangle",
                                background_color = "#000000",
                                font_size = 10,
                                )

        # Position
        highlighted_code.to_edge(UP + LEFT)

        # Animate the code display
        self.play(Create(highlighted_code, run_time=6))
        self.wait(3)

Thanx in advance,

Stephane