Changing color of label related to a button

I have multiple buttons and a label related to them which has green color on background. Everytime I click a button the corresponding label shows a yellow border color. I want that everytime I click a button only the corresponding label should change color and the previous clicked should change its color back to normal.

The way I tried is used a signal and slot mechanism for every button click. But the problem is I have to mention the color of not selected labels again and again. I want to reduce this part. Some one please help. Thanks in advance.

The current code is something like this

label1.setStyleSheet("background-color:green;");

label2.setStyleSheet("background-color:green;");

label3.setStyleSheet("background-color:green;");

label4.setStyleSheet("background-color:green;");

connect(button1,SIGNAL(clicked),this,SLOT(button1_ clicked());

connect(button2,SIGNAL(clicked(),this,SLOT(button1 _clicked());

void ClassName::button1_clicked()

{

label1.setStyleSheet("border-width:2px;border-style:solid;border-color:yellow;background-color:green);

label2.setStyleSheet("background-color:green;");

label3.setStyleSheet("background-color:green;");

label4.setStyleSheet("background-color:green;");

}



void ClassName::button2_clicked()

{

label2.setStyleSheet("border-width:2px;border-style:solid;border-color:yellow;background-color:green);

label1.setStyleSheet("background-color:green;");

label1.setStyleSheet("background-color:green;");

label1.setStyleSheet("background-color:green;");