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Build an HSV color picker in Blueprints

A hands-on exercise: the Unreal Engine project and a one-page guide to a widget with Hue, Saturation and Value sliders that recolors an object in real time.

• The starting Unreal Engine 4/5 project (ZIP) with the widget and assets
• A step-by-step guide to the Blueprint logic
• HSV in 20 seconds and the RGB conversion nodes
• The common pitfall: why the preview stays invisible

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