Can not use \textcolor , always render as white color

[zhangsn]

Description of bug / unexpected behavior

Same as title

Expected behavior

Should render the text in red color

How to reproduce the issue

Code for reproducing the problem

from manim import *

class Demo(Scene):
    def construct(self):
        myTemplate = TexTemplate()
        myTemplate.add_to_preamble(r"\usepackage{color}")
        mtex = MathTex(
            "\\textcolor{red}{red}",
            tex_template=myTemplate)
        self.add(mtex)

Logs

Terminal output

docker run --rm -it -v "/Users/zhangsn/Dev/manim:/manim" manimcommunity/manim manim -qm scenes.py Demo
Manim Community v0.18.1

[05/23/24 09:09:46] INFO                                                                                                                                                            scene_file_writer.py:737
                             File ready at '/manim/media/images/scenes/Demo_ManimCE_v0.18.1.png'                                                                                                            
                                                                                                                                                                                                            
                    INFO     Rendered Demo                                                                                                                                                      scene.py:247
                             Played 0 animations    

System specifications

System Details

use docker manimcommunity/manim  Manim Community v0.18.1

LaTeX details

• LaTeX distribution (e.g. TeX Live 2020):
• Installed LaTeX packages:

Additional comments

[uwezi]

You cannot use color inside your LaTeX, that is a known limitation in Manim.
(Otherwise almost all text would always be invisible since the default color in LaTeX is black, while by default Manim uses a white background...)

You will have to color your LaTeX objects in Manim afterwards using .set_color(). Or the different additional commands for "automatic" coloring - which might fail though, because of their respective limitations.

class Demo(Scene):
    def construct(self):
        myTemplate = TexTemplate()
        mtex1 = MathTex(
            r"\text{red}\,\int_0^\infty x\,\text{d}x",
            tex_template=myTemplate
        )
        mtex2 = Tex(
            r"red blue yellow",
        ).next_to(mtex1,DOWN)
        mtex1.set_color(RED)
        mtex2[0][0:3].set_color(RED)
        mtex2[0][3:7].set_color(BLUE)
        mtex2[0][7:].set_color(YELLOW)
        self.add(mtex1,mtex2)

[zhangsn]

Thanks for the reply.😄