Texture Presets - KSP-RO/Kerbal-Konstructs GitHub Wiki
To define new entries for the GrassColor editor you can create new .cfg files anywhere in the GameData Folder. you can have multiple entries in each file.
Usage: Can be either Texture or BlendMask
TextureFile is either a Builtin Texure or a path below GameData (like in the GameDatabase path)
KK_TexturePreset
{
Usage = Texture
TextureFile = BUILTIN:/terrain_grass00_new
}