Can Webflow support additive overlay?
TL;DR
- Use Webflow’s Style Panel to apply blend modes like screen or lighten via mix-blend-mode for a visual approximation of additive overlays.
- For accurate additive blending (e.g., "add" mode), insert custom CSS in page settings or use external code, as Webflow lacks native support.
Webflow does not natively support true additive overlay blend modes like “add” or “linear dodge” found in graphic design and video software, but you can approximate the effect using CSS blend modes and background settings.
1. Understand Additive Overlay
- Additive overlay in design typically means combining two layers by adding pixel values, resulting in a brighter blend—common in motion graphics or tools like Photoshop.
- In CSS (and therefore Webflow), the closest method is using the mix-blend-mode property.
2. Use CSS Blend Modes in Webflow
- Webflow allows you to apply mix-blend-mode to elements via the Style Panel.
- You can apply modes like screen, lighten, or overlay—which can mimic additive effects visually.
- To apply:
- Select your top overlay element.
- Go to the Style Panel.
- Under the Effects section, find Blend Mode.
- Choose a blend mode like screen for additive-bright styles.
3. Limitations of Webflow Blend Modes
- Not all additive behaviors are achievable—CSS doesn’t provide a true “add” blend mode.
- Browser rendering varies slightly, so visual results may differ across browsers.
- Elements with transparent backgrounds or overlapping content behave best with blend modes.
4. Custom Code Workaround (If Needed)
- For exact additive blending (like add or plus-lighter), you’d need to apply custom CSS using custom code blocks in Webflow.
- Example: Within a page’s Page Settings > Custom Code > Footer, you can target a specific class and set
mix-blend-mode: lighten;or a similar effect. - Webflow doesn’t support WebGL additive effects without deeper external JavaScript integrations.
Summary
Webflow does not support pure additive overlay, but you can closely mimic the effect using blend modes like screen or lighten through the Style Panel or custom CSS. For true additive blending, external tools or code would be required.