#health { background: url('../img/logo/black/health.png') center center no-repeat; }
#health:hover { background: url('../img/logo/color/health.png') center center no-repeat; }

#manufacture { background: url('../img/logo/black/manufacture.png') center center no-repeat; }
#manufacture:hover { background: url('../img/logo/color/manufacture.png') center center no-repeat; }

#motor { background: url('../img/logo/black/motor.png') center center no-repeat; }
#motor:hover { background: url('../img/logo/color/motor.png') center center no-repeat; }

#service { background: url('../img/logo/black/service.png') center center no-repeat; }
#service:hover { background: url('../img/logo/color/service.png') center center no-repeat; }

# { background: url('../img/logo/black/.png') center center no-repeat; }
#:hover { background: url('../img/logo/color/.png') center center no-repeat; }