This is an ancient ditty first found in print during the late 17th century. It has no particular ‘hidden’ meaning.
While the song is very old even for traditional nursery rhyme standards, it became increasingly popular quite recently. An R&B version of Lavender’s Blue released by Sammy Turner in 1959 reached no 3 on Billboard Hot 100, while even more recently the song got renewed attention after it was featured in Disney’s Cinderella in 2017.
Lavender’s Blue Lyrics
Lavender’s blue, dilly, dilly, lavender’s green,
When I am king, dilly, dilly, you shall be my queen;
Call up your men, dilly, dilly, set them to work,
Some to the plough, dilly, dilly, some to the cart;
Some to make hay dilly, dilly, some the thresh corn;
Whilst you and I, dilly, dilly, keep ourselves warm.