Panetone have released their 'colour of the year' - except this year it's 2 colours!
You can see the announcement here: http://www.pantone.com/color-of-the-year-2016
And on the Etsy blog here: https://blog.etsy.com/uk/2016/03/10/pantone-colour-of-the-year-2016/
It could be worth adding the tags 'rose quartz' or 'serenity' to some of your items that match these colour hues. There might not be that many shoppers who know about the colour trends but there will be some, but more importantly Etsy, and press like magazines or bloggers, may search those tags to see what products to feature in an on-trend article!
The other popular colours for the year can be seen in the Panetone Spring Repot here: https://www.pantone.com/pages/fcr/?season=spring&year=2016&pid=11.