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Select the Wand Tool and set the wand's tolerance to 33. Position the cursor over the woman's dress and click the left mouse button. Part of the dress should be selected. If the selection includes an area outside of the dress, reposition the cursor and select again.

Select Colorize from the Colours menu and set the hue to 160 and the saturation to 60. This will give the sweater a light blue colour.

Continue to colourize the rest of the sweater using the Select Tools and the Colorize function.