sub-menu custom font color

Hi,
I wrote some custom css for the sub-header. the objective is to change the background color to blue and make the font white. The font color works on all pages except the homepage. on the homepage the font is black but when you go to other pages its white as I like it.
here is the custom css:
/*heading font*/
h1, h2, h3, h4, h5, h6, .heading_font {
color: rgb(147, 7, 50);
font-family: “Montserrat”,Arial,Helvetica,sans-serif;
font-weight: normal;
letter-spacing: -0.02em;
line-height: 1.4em;
text-transform: uppercase;
}
/*subheader bkg color*/
.full_header {
background: rgb(0, 91, 153) none repeat scroll 0 0;
border-bottom: 1px solid rgb(238, 238, 238);
padding: 10px 0;
}
/*subheader contacts*/
.header_contact_item {
float: right;
margin-right: 22px;
color: #fff;
}
/*subheader menu*/
#subheader_menu a {
color: #fff !important;
font-size: 15px;
padding: 0 10px;
}
thanks!
Nancy