.button {
    margin: 10px;
    text-decoration: none;
    font: bold 25px 'Trebuchet MS',Arial, Helvetica;
    display: inline-block;
    text-align: center;
    color: #fff;
    border: 1px solid #9c9c9c;
    border: 1px solid rgba(0, 0, 0, 0.3);
    text-shadow: 0 1px 0 rgba(0,0,0,0.4);
    box-shadow: 0 0 1px rgba(0,0,0,0.4);
    -moz-box-shadow: 0 0 1px rgba(0,0,0,0.4);
    -webkit-box-shadow: 0 0 1px rgba(0,0,0,0.4);
    }
.button, .button span {
    -moz-border-radius: 6px;
    border-radius: 6px;
    }
.button span {
    border-top: 1px solid #fff;
    border-top: 1px solid rgba(255, 255, 255, 0.5);
    display: block;
    padding: 12px 50px;
    background-image: -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.25, rgba(0, 0, 0, 0.05)), color-stop(.25, transparent), to(transparent)),
     -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.25, rgba(0, 0, 0, 0.05)), color-stop(.25, transparent), to(transparent)),
     -webkit-gradient(linear, 0 0, 100% 100%, color-stop(.75, transparent), color-stop(.75, rgba(0, 0, 0, 0.05))),
     -webkit-gradient(linear, 0 100%, 100% 0, color-stop(.75, transparent), color-stop(.75, rgba(0, 0, 0, 0.05)));
    background-image: -moz-linear-gradient(45deg, rgba(0, 0, 0, 0.05) 25%, transparent 25%, transparent),
     -moz-linear-gradient(-45deg, rgba(0, 0, 0, 0.05) 25%, transparent 25%, transparent),
     -moz-linear-gradient(45deg, transparent 75%, rgba(0, 0, 0, 0.05) 75%),
     -moz-linear-gradient(-45deg, transparent 75%, rgba(0, 0, 0, 0.05) 75%);
    -moz-background-size: 3px 3px;
    -webkit-background-size: 3px 3px;
    }
.button:hover {
    box-shadow: 0 0 1px rgba(0,0,0,0.4);
    -moz-box-shadow: 0 0 1px rgba(0,0,0,0.4);
    -webkit-box-shadow: 0 0 1px rgba(0,0,0,0.4);
    }
.button:active  {
    position: relative;
    top: 1px;
    }

.button-brown {
    background: #8f3714;
    background: -webkit-gradient(linear, left top, left bottom, from(#bf6f50), to(#8f3714) );
    background: -moz-linear-gradient(-90deg, #bf6f50, #8f3714);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#bf6f50', EndColorStr='#8f3714');
    }
.button-brown:hover {
    background: #bf6f50;
    background: -webkit-gradient(linear, left top, left bottom, from(#8f3714), to(#bf6f50) );
    background: -moz-linear-gradient(-90deg, #8f3714, #bf6f50);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#8f3714', EndColorStr='#bf6f50');
    }
.button-brown:active {
    background: #8f3714;
    }

.button-orange {
    background: #f09c15;
    background: -webkit-gradient(linear, left top, left bottom, from(#f8c939), to(#f09c15) );
    background: -moz-linear-gradient(-90deg, #f8c939, #f09c15);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#f8c939', EndColorStr='#f09c15');
    }
.button-orange:hover {
    background: #f8c939;
    background: -webkit-gradient(linear, left top, left bottom, from(#f09c15), to(#f8c939) );
    background: -moz-linear-gradient(-90deg, #f09c15, #f8c939);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#f09c15', EndColorStr='#f8c939');
    }
.button-orange:active {
    background: #f09c15;
    }

.button-purple {
    background: #6F50E7;
    background: -webkit-gradient(linear, left top, left bottom, from(#B8A9F3), to(#6F50E7) );
    background: -moz-linear-gradient(-90deg, #B8A9F3, #6F50E7);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#B8A9F3', EndColorStr='#6F50E7');
    }
.button-purple:hover {
    background: #B8A9F3;
    background: -webkit-gradient(linear, left top, left bottom, from(#6F50E7), to(#B8A9F3) );
    background: -moz-linear-gradient(-90deg, #6F50E7, #B8A9F3);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#6F50E7', EndColorStr='#B8A9F3');
    }
.button-purple:active {
    background: #6F50E7;
    }

.button-green {
    background: #428739;
    background: -webkit-gradient(linear, left top, left bottom, from(#c8dd95), to(#428739) );
    background: -moz-linear-gradient(-90deg, #c8dd95, #428739);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#c8dd95', EndColorStr='#428739');
    }
.button-green:hover {
    background: #c8dd95;
    background: -webkit-gradient(linear, left top, left bottom, from(#428739), to(#c8dd95) );
    background: -moz-linear-gradient(-90deg, #428739, #c8dd95);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#428739', EndColorStr='#c8dd95');
    }
.button-green:active {
    background: #428739;
    }

.button-blue {
    background: #4477a1;
    background: -webkit-gradient(linear, left top, left bottom, from(#81a8cb), to(#4477a1) );
    background: -moz-linear-gradient(-90deg, #81a8cb, #4477a1);
    filter:  progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#81a8cb', endColorstr='#4477a1');
    }
.button-blue:hover {
    background: #81a8cb;
    background: -webkit-gradient(linear, left top, left bottom, from(#4477a1), to(#81a8cb) );
    background: -moz-linear-gradient(-90deg, #4477a1, #81a8cb);
    filter:  progid:DXImageTransform.Microsoft.gradient(GradientType=0,startColorstr='#4477a1', endColorstr='#81a8cb');
    }
.button-blue:active  {
    background: #4477a1;
    }

.button-red {
    background: #D82741;
    background: -webkit-gradient(linear, left top, left bottom, from(#E84B6E), to(#D82741) );
    background: -moz-linear-gradient(-90deg, #E84B6E, #D82741);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#E84B6E', EndColorStr='#D82741');
    }
.button-red:hover {
    background: #E84B6E;
    background: -webkit-gradient(linear, left top, left bottom, from(#D82741), to(#E84B6E) );
    background: -moz-linear-gradient(-90deg, #D82741, #E84B6E);
    filter: progid:DXImageTransform.Microsoft.Gradient(GradientType=0, StartColorStr='#D82741', EndColorStr='#E84B6E');
    }
.button-red:active {
    background: #D82741;
    }

<a href="#" class="button button-brown"><span>Кнопочка</span></a>
<a href="#" class="button button-orange"><span>Кнопочка</span></a>
<a href="#" class="button button-purple"><span>Кнопочка</span></a>
<a href="#" class="button button-green"><span>Кнопочка</span></a>
<a href="#" class="button button-blue"><span>Кнопочка</span></a>
<a href="#" class="button button-red"><span>Кнопочка</span></a>