added placeholder theme color
added placeholder theme color

azaars/vuetify,KaelWD/vuetify,Webifi/vuetify,Phlow2001/vuetify,Phlow2001/vuetify,azaars/vuetify,vuetifyjs/vuetify,vuetifyjs/vuetify,KaelWD/vuetify,vuetifyjs/vuetify,Phlow2001/vuetify,KaelWD/vuetify,Webifi/vuetify,vuetifyjs/vuetify,Webifi/vuetify,Phlow2001/vuetify