.marcas {
    width: 90%;
    margin: 0px auto;
}
.slick-slide {
    margin: 10px
}
.slick-arrow {
	color:#999 !important;
}
.slide-arrow{
  position: absolute;
  top: 50%;
  margin-top: -15px;
}
.prev-arrow{
  left: -40px;
  width: 0;
  height: 0;
}
.next-arrow{
  right: -40px;
  width: 0;
  height: 0;
}