How to use the pysubs2.Color function in pysubs2

def test_color_parsing():
    solid_color = Color(r=1, g=2, b=3)
    transparent_color = Color(r=1, g=2, b=3, a=4)

    assert ssa_rgb_to_color(color_to_ssa_rgb(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(transparent_color)) == transparent_color

    assert ass_rgba_to_color("&HAABBCCDD") == Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)
    assert color_to_ass_rgba(Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)) == "&HAABBCCDD"

def build(self, **extra):
        from pysubs2 import SSAFile, SSAEvent, Color # type: ignore[import]
        millis = lambda td: td / timedelta(milliseconds=1)
        subs = (
            SSAEvent(
                start=millis(t - self.start),
                end  =millis(t - self.start + timedelta(seconds=length)),
                text=text.replace('\n', r'\N'), # \N necessary for SSA files
            ) for t, text, length in self.l
        )
        sf = SSAFile()
        style = sf.styles['Default'].copy()
        style.fontsize = 16 # default is 20, bit too much??
        style.outlinecolor = Color(0, 0, 0, 50) # semitransparent
        style.shadow = 0.0

        style.outline = 0.1
        style.borderstyle = 3 # no idea why 3, but it makes the background apperar in conjunction with outline

        for k, v in extra.items():
            setattr(style, k, v)
        sf.styles['Default'] = style
        for s in subs:
            sf.append(s)
        return sf.to_string('ass')

def test_color_parsing():
    solid_color = Color(r=1, g=2, b=3)
    transparent_color = Color(r=1, g=2, b=3, a=4)

    assert ssa_rgb_to_color(color_to_ssa_rgb(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(transparent_color)) == transparent_color

    assert ass_rgba_to_color("&HAABBCCDD") == Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)
    assert color_to_ass_rgba(Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)) == "&HAABBCCDD"

def test_color_parsing():
    solid_color = Color(r=1, g=2, b=3)
    transparent_color = Color(r=1, g=2, b=3, a=4)

    assert ssa_rgb_to_color(color_to_ssa_rgb(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(transparent_color)) == transparent_color

    assert ass_rgba_to_color("&HAABBCCDD") == Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)
    assert color_to_ass_rgba(Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)) == "&HAABBCCDD"

def test_color_parsing():
    solid_color = Color(r=1, g=2, b=3)
    transparent_color = Color(r=1, g=2, b=3, a=4)

    assert ssa_rgb_to_color(color_to_ssa_rgb(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(solid_color)) == solid_color
    assert ass_rgba_to_color(color_to_ass_rgba(transparent_color)) == transparent_color

    assert ass_rgba_to_color("&HAABBCCDD") == Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)
    assert color_to_ass_rgba(Color(r=0xDD, g=0xCC, b=0xBB, a=0xAA)) == "&HAABBCCDD"