This gradient uses the same idea, of making a hard color demarcation, but runs from top to bottom creating a gloss effect.
background: -moz-linear-gradient(top, #9d2e2c 0%, #9d2e2c 50%, #990000 51%, #990000 100%);
background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#9d2e2c), color-stop(50%,#9d2e2c), color-stop(51%,#990000), color-stop(100%,#990000));
background: -webkit-linear-gradient(top, #9d2e2c 0%,#9d2e2c 50%,#990000 51%,#990000 100%);
background: -o-linear-gradient(top, #9d2e2c 0%,#9d2e2c 50%,#990000 51%,#990000 100%);
background: -ms-linear-gradient(top, #9d2e2c 0%,#9d2e2c 50%,#990000 51%,#990000 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#9d2e2c', endColorstr='#990000',GradientType=0 );
background: linear-gradient(top, #9d2e2c 0%,#9d2e2c 50%,#990000 51%,#990000 100%);