[feature request] Support of coloring for Simple Icons

- [x] I have checked documentation.
- [x] I have checked the issues.

For example, [Homepage](https://github.com/gethomepage/homepage) does have support for coloring Simple Icons (also for material design icons).

See example here: https://gethomepage.dev/configs/services/#icons
```
You can specify a custom color for mdi and si icons by adding a hex color code as a suffix e.g. mdi-XX-#f0d453 or si-XX-#a712a2.
```

This could be a good feature to add to Glance.