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Combining SVG with CSS: Dynamic Theming and Hover Interactions

ER
Elena Rostova
June 24, 2026
6 min read

SVGs don't have to be static assets. Since SVG elements are fully interactive DOM elements, you can style them, transition them, and trigger hover states using standard CSS.

1. Styling properties: fill, stroke, and transform

Many SVG presentation attributes map directly to CSS properties:

  • fill: Sets shape background colors (maps to `fill` in CSS).
  • stroke: Sets line outline colors (maps to `stroke` in CSS).
  • stroke-width: Sets line width size.

2. Vector Code Example: Hover CSS

hover_style.svg
<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg" class="icon-card">
  <style>
    .icon-card {
      width: 100px;
      height: 100px;
      cursor: pointer;
    }
    .hover-fill {
      fill: #cbd5e1;
      transition: fill 0.3s ease;
    }
    .icon-card:hover .hover-fill {
      fill: #f97316;
    }
  </style>
  <rect width="100" height="100" rx="15" fill="#f8fafc" stroke="#e2e8f0" stroke-width="2" />
  <circle cx="50" cy="50" r="20" class="hover-fill" />
</svg>