I am using QGIS V3.22.6.

I have imported a set of polygons digitised in Google Earth. They all have the same name but have different polygon colours.

I would like to rename these according to their colour, but am unable to work out how to select the polygon by colour.

  • 2
    Can you provide sample data? How many colors are there? You have saved color names in attributes?
    – Babel
    Mar 12 at 11:04
  • Very simple - I have about 300 elements with only 3 different colours (all either primary or secondary, so no variation allowance required.
    – Norman
    Mar 12 at 11:06
  • The colour names are not in the attribute table
    – Norman
    Mar 12 at 11:08
  • 1
    But where are the colors defined then?
    – Babel
    Mar 12 at 11:11
  • I don't know! I can't see that anywhere - sorry, I'm new to QGIS. I will upload a sample if you tell me how I can do that.
    – Norman
    Mar 12 at 11:12

1 Answer 1


You need a script to select same colored features because the kml layer uses "Embedded Symbols" and the attribute table doesn't include any information about colors or polygons with same color.

  • Open Python Editor (Ctrl+Alt+P then click middle icon)
  • Select the layer and run this script.
# get active layer
layer = iface.activeLayer()
# feature list
features = list(layer.getFeatures(QgsFeatureRequest().setFlags(QgsFeatureRequest.EmbeddedSymbols)))
# embedded symbols
symbols = [f.embeddedSymbol().clone() if f.embeddedSymbol() else None for f in features]
# colors of embedded symbols
colors = {f.id(): s.color().name() for f, s in zip(features, symbols)}

for color in set(colors.values()):
    # features with the same color
    feature_ids = [fid for fid, c in colors.items() if c == color]
    layer.selectByIds(feature_ids) # select the features
    # extract the selected features as temporary layer
    output = processing.run("native:saveselectedfeatures",
                             # set color and name for the output
    # add the layer to the project

enter image description here

  • Excellent, thank you
    – Norman
    Mar 13 at 9:19
  • 3
    If you are satisfied with the solution, please consider upvoting by clicking on the arrows next to the score and/or marking it as the accepted answer by clicking on the checkmark ✓. This shows others that the question is solved and will remove it from the list of unanswered questions. Mar 13 at 9:37

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