After manually editing a plot by changing the colours and filling of the curves using the drawing tools, is there any way to update the legend, so that it corresponds with the new colours?

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    $\begingroup$ Why don't you run the Plot function again using the colours and filling you actually want in its options? Manually editing plots as part of your workflow isn't a good idea, usually. $\endgroup$ – Sjoerd C. de Vries Aug 11 '15 at 13:25
  • $\begingroup$ I'm just getting started with Mathematica, but it seems to me that the options of colouring are limited when you want to enter them in the function, whereas when I edit it I can choose from the whole palet of colours. $\endgroup$ – Joan Aug 11 '15 at 13:47
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    $\begingroup$ That's not actually true. You can provide any color you like using the PlotStyle option. You can choose from color palettes or use color specifications for instance with RGBColor $\endgroup$ – Sjoerd C. de Vries Aug 11 '15 at 13:49
  • $\begingroup$ Great, that's the one I needed! Thanks! $\endgroup$ – Joan Aug 11 '15 at 14:36