IntelliJ color scheme for Kotlin DSL

IntelliJ provides options for adjusting the color scheme of Kotlin DSL expressions under:

File | Settings | Editor | Color Scheme | Kotlin | Dsl | Style1
File | Settings | Editor | Color Scheme | Kotlin | Dsl | Style2
File | Settings | Editor | Color Scheme | Kotlin | Dsl | Style3
File | Settings | Editor | Color Scheme | Kotlin | Dsl | Style4

Does anyone know why there are 4 styles? Which one is used in what situation?

I understand it now. It seems to be randomly assigned to individual dsl annotations. For example the HtmlTagMarker annotation from kotlinx-html library is assigned style2. It is probably based on the hash of the annotation name or something.