Exactly #BADA55.
Roll exactly #BADA55 in Hexdle. Each of the 16,777,216 colors is as likely as any other, so the chance is 1 in 16,777,216 a roll: the word it spells is what makes it a badge. Hexdle has 10 such colors, each a word spelled in hex.
A color a day, free, no account needed.