query for general css

hi

my homepage footer has social icons by zoom social icons now to change the colour of the icons to green.
.socicon-facebook {
background-color: #92d050;
color: #92d050;
}

.socicon-instagram {
background-color: #92d050;
color: #92d050;
}

.socicon-twitter {
background-color: #92d050;
color: #92d050;
}

it changed colours of 3 icons but other 3 same css but no change

Please can you help