The ruta flower has yellow blooms, but according to legend, on the eve of Ivan Kupala Day, the flower turns red for a very short time on the eve of the summer solstice (celebrated on June 23 or sometimes July 7).
In various versions of the tale, the fern flower brings luck, wealth, or the ability to understand animal speech.
"Chervona Ruta" is a popular Ukrainian song written by Volodymyr Ivasyuk in 1968 and performed by many singers and groups.
It was popularised by Ukrainian groups like "Smerichka" and singer Sofia Rotaru, who later formed the Chervona Ruta ensemble.
The song's initial popularity was followed by a 1971 Ukrainian musical film Chervona Ruta written by Miroslav Skochilyas and directed by Roman Oleksiv, starring Sofia Rotaru and Vasyl Zinkevych alongside other popular Soviet Ukrainian ensembles.