Very interesting to be sure. It looks to me like the original color was blue, then covered in white...
Like you say, if it doesn't bother you, then that's fine
![Smiley :)](https://worldwidebeekeeping.com/forum/Smileys/wBee/smiley.gif)
At least you can still spot her quickly. Personally, I always mark my queens with a neon pink, that color Really stands out. I'm not concerned with how old she is unless she's slowing way down.
However, if you were guaranteed a new marked queen specifically for that year, and the breeders covered a two year old queen with dot with the following year... well that would seem like a jip to me... and I might not trust those queen breeders again.
Good eye Wfarm! My eyesight probably wouldn't have picked that up