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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"[ENH]: provide 'last' keyword for color argument : plot(x, y, color='last')","articleBody":"### (Not exactly a) Problem\n\nI like to plot several lines with the same color (...and different linestyle for example).\nIt is already quite easy to write \n```\ndef plt_last_color() : return plt.gca().lines[-1].get_color()\n\nplt.plot(x, y1)\nplt.plot(x, y2, lw=3, alpha=0.5, ls='dotted', color=plt_last_color())\n```\n\n### Proposition\n\nYet it would be more elegant to have this way :\n```\nplt.plot(x, y2, lw=3, alpha=0.5, ls='dotted', color='last')\n```\nThis would especially allow to have the 'last' keyword in a dictionnary, for easier management of big plots :\n```\nkw_1st = {}\nkw_2nd = {lw=3, alpha=0.5, ls='dotted', color='last'}\n\nplt.plot(x, y1, **kw_1st)\nplt.plot(x, y2, **kw_2nd)\n```\n\nProbably, there are questions to consider like in the case of multiple axes instances :\n```\nax.plot(x, y2, lw=3, alpha=0.5, ls='dotted', color='last')\n```\n-\u003e should the 'last' color be the last one plotted in the referenced `ax` of the same line (I think yes) or the last plotted color in the global plt scope...\n","author":{"url":"https://github.com/hprodh","@type":"Person","name":"hprodh"},"datePublished":"2025-07-21T19:24:22.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":11},"url":"https://github.com/30338/matplotlib/issues/30338"}