.rainbow {
  font-size: 1.5em;
  font-family: sans-serif;
  text-transform: uppercase;
}

.rainbow > span:nth-child(8n + 1) { color: #ff6b6b; }   /* Soft Red */
.rainbow > span:nth-child(8n + 2) { color: #f48fb1; }   /* Light Pink */
.rainbow > span:nth-child(8n + 3) { color: #ba68c8; }   /* Soft Purple */
.rainbow > span:nth-child(8n + 4) { color: #64b5f6; }   /* Light Blue */
.rainbow > span:nth-child(8n + 5) { color: #4dd0e1; }   /* Aqua */
.rainbow > span:nth-child(8n + 6) { color: #81c784; }   /* Soft Green */
.rainbow > span:nth-child(8n + 7) { color: #ffd54f; }   /* Light Yellow */
.rainbow > span:nth-child(8n + 8) { color: #ffb74d; }   /* Soft Orange */