René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"ENH: Improved color Manipulation tools","articleBody":"\u003c!--To help us understand and resolve your issue, please fill out the form to the best of your ability.--\u003e\r\n\u003c!--You can feel free to delete the sections that do not apply.--\u003e\r\n\r\n### Feature suggestion\r\n\r\nIn #9985 a small utility was proposed to brighten or darken a matplotlib color.  The utility converted to RGB, to HLS, manipulated the L (lightness) channel, and converted back to RGB.  \r\n\r\nThere was general disagreement about how exactly to do the brightening, (fractional: L*(1+frac), absolute: L + dL, or simply specifying L), the lack of a `rgb_to_hls` converter was lamented (to mirror the `rgb_to_hsv` converter, and it was suggested that a color class that simply had methods to change channels in the various color spaces would be the better approach.  \r\n\r\nWriting such a class was beyond the scope proposed in #9985, hence this issue for discussion.  I'd imagine such a `color` class would require a MEP.\r\n\r\n\r\n\u003c!--Please tell us how you installed matplotlib and python e.g., from source, pip, conda--\u003e\r\n\u003c!--If you installed from conda, please specify which channel you used if not the default--\u003e\r\n\r\n","author":{"url":"https://github.com/jklymak","@type":"Person","name":"jklymak"},"datePublished":"2017-12-13T18:46:43.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/9995/matplotlib/issues/9995"}