How do I set the color of a border ?

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• On the Borders tab, click the axis you wish to apply the border to. In the screenshot below, I've selected the top border.
• In the middle of that dialog, under the Line settings, choose your width/weight and colour.
• Click OK. (Instructions continue below...)

• ...Now, holding SHIFT, select the other three borders, and alter your settings to the other colour.
• Click OK. All done.

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