rgba() Colors & opacity

opacity: 1;

rgba(255, 0, 0, 1);

opacity: .8;

rgba(255, 0, 0, .8);

opacity: .6;

rgba(255, 0, 0, .6);

opacity: .4;

rgba(255, 0, 0, .4);

opacity: .2;

rgba(255, 0, 0, .2);

opacity: .1;

rgba(255, 0, 0, .1);