Stitching lots of buttons in similar colours and shades mixed in with a few sequins makes for a lovely bit of embellishment. I thought I'd add the photograph, I took it and did it a while ago.
I have such a backlog of images to post on here it's untrue!!
This was on the centre front of a black dress, that I really love, but hardly ever wore, because I'm not into too much black, I need splashes of colour, I usually just pile as many colours on as possible to be honest!