I kindly try the below css.
.btn-primary
{
color: #ffffff;
text-shadow: 0 -1px 0 rgba(0, 0, 0, 0.25);
background-color: #006dcc;
background-image: -moz-linear-gradient(top, #0088cc, #0044cc);
background-image: -webkit-gradient(linear, 0 0, 0 100%, from(#0088cc), to(#0044cc));
background-image: -webkit-linear-gradient(top, #0088cc, #0044cc);
background-image: -o-linear-gradient(top, #0088cc, #0044cc);
background-image: linear-gradient(to bottom, #0088cc, #0044cc);
background-repeat: repeat-x;
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ff0088cc', endColorstr='#ff0044cc', GradientType=0);
border-color: #0044cc #0044cc #002a80;
border-color: rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.1) rgba(0, 0, 0, 0.25);
filter: progid:DXImageTransform.Microsoft.gradient(enabled = false);
}
Regards
M