$t0: rgba(255,255,255, 1);
$t1: rgba(255,255,255, 0.1);
$t2: rgba(255,255,255, 0.2);
$t3: rgba(255,255,255, 0.3);
$t4: rgba(255,255,255, 0.4);
$t5: rgba(255,255,255, 0.5);
$t6: rgba(255,255,255, 0.6);
$t7: rgba(255,255,255, 0.7);
$t8: rgba(255,255,255, 0.8);
$t9: rgba(255,255,255, 0.9);