Webflow does not currently have a built-in feature for customizing the placeholder color before and after a selection in the "Select Field" component without using a label above the field. However, it's always possible that Webflow may add this functionality in future updates or releases as they consistently strive to improve their platform based on user feedback and needs.
In the meantime, if you have basic coding knowledge, you can achieve this effect by customizing the Select Field component using custom code or JavaScript. Here's a step-by-step guide on how you can accomplish this:
1. Add a Custom Embed component to your Webflow project. You can find this component in the Add Panel or simply press 'E' on your keyboard while in the Designer.
2. In the Custom Embed settings, choose where you want to place the component (e.g., within a form or specific section) and select the "Embed Code" option.
3. Inside the CODE section of the Custom Embed, you can start adding your custom JavaScript code. Here's an example code snippet that you can use as a starting point:
```html
```
4. In the above code snippet, replace ".your-select-class-name" with the actual class name of your Select Field component. Make sure to locate and inspect the Select Field in your Webflow project, and note down its class name.
5. Once you've added the JavaScript code, you can style the Select Field component with custom CSS to achieve the desired effect. Here's an example CSS snippet:
```html
```
6. In the CSS snippet, replace ".your-select-class-name" with the actual class name of your Select Field component. Adjust the color values (#555 and #000) to match your desired color scheme.
7. Save and publish your Webflow project to see the changes take effect.
By following the above steps, you can override the default styles of the Select Field component and apply custom placeholder and selected value colors. Remember to always test and preview your changes across different devices and browsers to ensure a consistent experience for your visitors.
It's important to note that this is not an official feature or supported by Webflow directly, so understanding and implementing custom code carries a certain level of responsibility. If you're not comfortable with coding or prefer to rely on native Webflow features, I recommend keeping an eye on Webflow's official release notes and feature requests forum to stay updated on any new enhancements or improvements related to Select Fields.