Replication code for a pyglet crash involving RGB colors & underlines

pyglet_2_0_color_setter_crash.py

import pyglet

COLOR = (255, 255, 255, 255) # RGB values will crash the code
LINE_HEIGHT_PX=40
FONT_SIZE_PT=20
TEXT="Test"
TAG='b' # u sets it off, but b does not

def html(tag, contents):
    return f"<{tag}>{contents}</{tag}>"

window = pyglet.window.Window(200,200)
batch = pyglet.graphics.Batch()

@window.event
def on_draw():
    window.clear()
    batch.draw()

shared_data = dict(x=window.height // 2, batch=batch)


label_data = [
    (pyglet.text.Label,     [TEXT]           , dict(bold=True, font_size=FONT_SIZE_PT)),
    (pyglet.text.HTMLLabel, [html(TAG, TEXT)], {}                                     )
]

label_instances = []

current_y = (window.height // 2) - (len(label_data) // 2) * 20
for label_class, args, kwargs in label_data:
    label = label_class(*args, y=current_y, **shared_data, **kwargs)
    label.color = COLOR
    label_instances.append(label)
    current_y += LINE_HEIGHT_PX

pyglet.app.run()