How SVG fill, stroke, and currentColor actually work in the CSS cascade

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SVG colors can be set via presentation attributes, inline styles, or CSS rules, each with different cascade priority — a detail that trips up many developers. Every SVG shape has a fill (defaulting to black) and a stroke (defaulting to none), which are controlled independently. Editing the wrong property, such as adjusting stroke-width on a fill-only icon, produces no visible change and is a common debugging dead end. The keyword currentColor lets multiple shapes share a single color value, and works especially well when an SVG is inlined in HTML, allowing external CSS to control the entire graphic through one variable. Understanding this cascade behavior is essential before relying on visual tools to edit SVGs effectively.

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