Strange animation behavior with improperly specified color

When a scatter line color is specified using rgb() with float values in [0, 1] rather than integers in [0, 255], it seems to actually produce the expected color. However, when animating a scatter trace with a constant color specified this way, it turns to black during the animation. If the animation sets redraw=True it will go back to the "correct" color after the transition completes, but if redraw=False then it stays black.

Here's a colab that demonstrates the issue: https://colab.research.google.com/drive/1enQGu6ProJg22F9KxAwsewf7UvbS3fkF?usp=sharing

I'm not sure if the correct fix to this is to make the animations work the same way as for correctly specified colors or to make incorrectly specified colors always show up as black (i.e. get cast to ints) or raise an error. The current situation results in a difficult to debug behavior.

Commencez par la reproduction Colab liée et comparez les animations de scatter utilisant des valeurs float de rgb() avec redraw=True et redraw=False. Suivez la manière dont la couleur constante est gérée pendant l’animation par rapport à après un redraw, puis déterminez si les valeurs de couleur malformées doivent être normalisées, rejetées ou traitées de manière cohérente.