YAML files

If you're reporting an UI issue, make sure you take a screenshot that shows the actual bug.
Looking at YAML files, all the text is yellow.

[fmatter]

Came here to report the same thing:

[leohidalgo]

+1

[Zoopa]

I improved the syntax highlighting with an additional rule (in Preferences > Customize Color Theme):

{
	"scope": "entity.name.tag.yaml",
	"foreground": "#FF80BF"
}

This at least makes the tag names stand out:

It's also possible to use the following generic rule, which would apply to all keys from key-value pairs (e.g. JSON):

{
	"scope": "meta.mapping.key string",
	"foreground": "#FF80BF"
}