Yes, you can overlay a semi-transparent color onto the background of a section in Webflow without using an image.
Here's how you can achieve this effect:
1. Select the section you want to apply the overlay to by clicking on it in the Webflow Designer.
2. In the Style panel on the right, go to the "Background" section and click on the color picker next to the "Background Color" property.
3. Choose the desired base color for the background. Keep in mind that this will be the color that the semi-transparent overlay is applied to.
4. After selecting the base color, you can now apply the semi-transparent overlay. To do this, click on the "+" button to add a new background style.
5. In the new background style, click on the color picker next to the "Background Color" property and select the color you want for the overlay. You can adjust the transparency by dragging the opacity slider or manually entering a value.
6. By default, the overlay will be applied on top of the base color. If you want the overlay to be behind the content within the section, you can adjust the "Blend Mode" property. Select the section, go to the "Effects" section in the Style panel, and choose a blend mode that suits your design.
7. You can further customize the overlay by adjusting other properties like "Background Image," "Background Position," and "Background Size" if desired.
8. Preview your changes in the Webflow Designer to see how the overlay looks on your section. You can also test it on different devices to ensure it responds well to various screen sizes.
Remember to save your changes and publish your site to see the overlay effect live on your website.