Just this very day I was able to post elsewhere a flower shot that had a bothersome background - but no longer after I darkened it and lowered the saturation, the while retaining the flower chroma/lightness and adjusting the flower hue a tad in a desirable direct and, tsk, I might even have upped the chroma a bit. Voila:
https://www.dpreview.com/forums/post/63897718
Fortunately, the background color was a complement of the petal color but even so and for a different subject I could have adjusted the background hue or just colorized it.