What color(s) would I add to Satin Ice red to make the color more realistic for red roses. It is so bright, it just reminds me of Christmas. Thanks in advance....

Maybe just a smidgen of blue? Red roses tend to be more toward the violet side of the spectrum than the orange one (which would be achieved by adding yellow). Actually, Satin Ice red is so dark, I usually lighten it up with a little white fondant before I try to mess with the shade of red. HTH!