There's an easy solution no further than the 99 cent paint isle of your local craft store. Paint. If it's summer and you've got a lot of stems to make, pull out the spray paint. If you don't have a million to make, use paint and a brush.
You can twist the stems either before or after you paint them. I got this color with Delta Creative's Ceramcoat, Santas Flesh, which suddenly sounds very creepy. The painting really adds to the personal touch. You can make poms (any flower) with the season and holiday in mind. These gray and pink flowers would be lovely for a bridal shower, a baby shower or an Easter Brunch.