Unity Rich Text allows you easily highlight any variable when using Debug.Log or any other place that supports rich text (i.e. GUIStyle or TextMeshPro).

It makes very easy to apply a few rich text tags at once.

Note that it creates a lot of garbage hence I don't recommend to use it in production.

The package is available on the openupm registry. It's recommended to install it via openupm-cli.

openupm add com.skibitsky.unity-rich-text

Open Packages/manifest.json with your favorite text editor. Add the following line to the dependencies block.

{
    "dependencies": {
        "com.skibitsky.unity-rich-text": "https://github.com/skibitsky/unity-rich-text.git"
    }
}

Notice: Unity Package Manager records the current commit to a lock entry of the manifest.json. To update to the latest version, change the hash value manually or remove the lock entry to resolve the package.

"lock": {
  "com.skibitsky.unity-rich-text": {
    "revision": "master",
    "hash": "..."
  }
}

Debug.Log(17.Red().Bold()):