4S10A87 2F693E5 T902Y48 [Before you ask: yes, it’s formatted as shown, I triple-checked for errors before posting, the zeroes are zeroes and not letter ohs, the one is a one and not the letter ℓ, and...
On the left:
#FF0000
#0000FF
#808000
#800080
(these being the RGB colour hex codes for red, blue, olive green, purple).
On the right: an image of an engagement ring....