Decrease Accent Color Saturation in Theme settings for a more pastel look on the browser interface.
Vivaldi Theme settings allow you to display your chosen color or a color of the active page on the Tab Bar or Navigation Bar (depends on your Color Overrides settings). While your chosen color is most likely perfect, colors from active pages can sometimes be too bright. If the vivid colors become too distracting, you can fix that in Theme settings.
To adjust accent color saturation:
- Go to Settings > Themes.
- Go to the Editor tab and from the drop down menu select the theme you want to update.
- Adjust the value of Limit Accent Color Saturation to your liking.
The smaller the value the more subdued the color will be.