Symbol colour in legend in errorbar plot does not correspond to colour on figure

Question

In the following example the colour in the legend for data_3 will not appear as the same colour that is set in plt.errorbar([..],color='red'). Strangle this only applies to certain symbol and colour combinations. For example a red square will appear as a black square in the legend however a red circle will appear correctly in the legend. This seems to only be an issue when the legend is positioned outside the figure. Here is a worked example: import matplotlib.pyplot as plt import matplotlib import seaborn as sns sns.set() # set style of plots to seaborn

    matplotlib.rcParams['legend.handlelength'] = 0
    matplotlib.rcParams['legend.markerscale'] = 1

    labels = ['data_1','data_2','data_3','data_4']
    symbols = ['o','D','s','D']
    fill_style = ['none','full','none','full']
    colours = ['MediumPurple','Maroon','red','yellowGreen']

    x=range(10)
    y=range(10)

    for i in range(len(symbols)):
         plt.errorbar(x,[a+i*2 for a in y],elinewidth=1,color=colours[i],fmt=symbols[i],label=labels[i],ms=4,fillstyle=fill_style[i],markeredgewidth=1.75,markeredgecolor=colours[i])

    plt.legend(loc='center left',bbox_to_anchor=(1, 0.5))

results for above code

Can you show the figure where this is not showing as expected? Providing the figure of the expected result may be useful as well, but not on its own. — ImportanceOfBeingErnest
Actually, which browser are you using to view the notebook? Can you try with firefox? — ImportanceOfBeingErnest

Cloud30 Cloud30 · Accepted Answer · 2018-11-15T14:36:13

Just realised this is only a problem when displaying the figure in a jupyter notebook. When the figure is saved as either a .pdf or .png the legend entries all appear as they should, as you can see from the figure I provided!

Symbol colour in legend in errorbar plot does not correspond to colour on figure

1 Answers