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BorderColor3 determines the color of a GuiObject|UI element’s rectangular border (also known as the stroke color).

This is separate from the UI element’s GuiObject/BackgroundColor3. If you set a UI element’s border and background colors to the same color, you will be unable to distinguish the two.

Other properties properties that determine the visual properties of the border include GuiObject/BorderSizePixel and GuiObject/BackgroundTransparency.

Note that you will not be able to see an element’s border if its BorderSizePixel property is set to 0.

Code Samples

Rainbow Frame

This code sample causes a parent Frame to loop through all colors of the rainbow using Color3.fromHSV.

Button Highlight

This code sample causes the border of a parent GuiObject to highlight when the user hovers their mouse over the element.