How can i change the Background Color of a Button?

Flow
1

Thats my css: (its just change the color of the Caption instead the Buttoncolor)

.mid-tech .azoButtonGruen .v-button-wrap{
height: 60px;
width: 170px;
font-size: 16px;
background: green;
}

any suggestments?

2

nevermind, it works now