René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Transparency, color mixing, gamma \u0026 linear color space ?","articleBody":"Hello all.\n\nThis is my first time playing with matplotlib so I'm not sure if this is a feature or a bug but I needed to scatter a large number of points that are transparent. I need transparency so that I could observe the density of theses particles (I should probably make a 2D histogram... ). The problem I noticed is that if I increased the alpha of particles I would start to see black. The picture explains it.\n\n![problem](https://cloud.githubusercontent.com/assets/6205969/12699436/2f481e32-c7bb-11e5-9003-d23229f51d59.png)\n\nI believe the problem is the handling of colors internally. Is it all linear color space with correct gamma handling ?\n","author":{"url":"https://github.com/gvinterhalter","@type":"Person","name":"gvinterhalter"},"datePublished":"2016-01-31T00:37:44.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":14},"url":"https://github.com/5949/matplotlib/issues/5949"}