title: Python, pptx to change line color in line chart
body: <p>Created a line chart using pptx. I want to change the line color to red.</p>
  
  <p>Added the "fill" and indicated the RGBColor (255, 0, 0) but it's still blue.</p>
  
  <p>How can I change it to red? Thank you.</p>
  
  <pre><code>from pptx import Presentation
  from pptx.chart.data import ChartData
  from pptx.enum.chart import XL_CHART_TYPE
  from pptx.util import Inches
  from pptx.dml.color import RGBColor
  
  prs = Presentation()
  slide = prs.slides.add_slide(prs.slide_layouts[5])
  
  chart_data = ChartData()
  chart_data.categories = ["2014", "2015", "2016", "2017", "2018"]
  chart_data.add_series('Series 1', ("50", "45", "46", "52", "56"))
  
  x, y, cx, cy = Inches(0.5), Inches(2), Inches(8), Inches(3.5)
  
  graphic_frame = slide.shapes.add_chart(XL_CHART_TYPE.LINE, x, y, cx, cy, chart_data)
  chart = graphic_frame.chart
  plot = chart.plots[0]
  series = plot.series[0]
  
  fill = series.format.fill
  fill.solid()
  fill.fore_color.rgb = RGBColor(255, 0, 0)
  
  prs.save('c:\\My Documents\\line chart.pptx')
  </code></pre>