1. Open Webflow and start a new project or jump into an existing one.
2. Drag and drop a "Navbar" element from the Add panel (shortcut: press A).
3. Place your Navbar where it fits best within your page's layout.

1. Select the Navbar and head over to the Style panel (shortcut: press S).
2. Tweak the Navbar elements like background color, height, and typography to match your design.

1. Make sure the Navbar is selected.
2. In the Style panel, scroll down to the "Position" section.
3. Change the position to "Fixed."
4. Set it to “Top” so the Navbar stays glued to the top of the page.

1. With the Navbar selected, go to the Interactions panel (shortcut: press H).
2. Click on "Element triggers" and pick "While page is scrolling."

1. In the Interactions panel, add a new "Page Scroll" animation.
2. Choose "Scroll into view."
3. Click “+” to add a new action and select “Background Color.”

1. For the initial state, set the background color to your default (e.g., transparent or a specific color).
2. For the scrolling state, pick your desired new background color (e.g., a solid color).

1. Adjust the scroll settings to define where the color change kicks in (e.g., at 10% scroll or halfway through the page).
2. Fine-tune the scroll behavior so transitions look smooth and natural.

1. Save your changes and preview your page.
2. Scroll and watch the Navbar color change effect.
3. Go back to Interaction settings if you need to tweak things to get the perfect look.

These steps outline how to create a fixed navigation bar that changes color as you scroll using Webflow's tools and interactions.