I am making a wedding cake for this weekend and the colors are light peach and light pink. I bought Creme peach coloring and added, what I thought, was very little to a batch of white buttercreme icing.
The icing now looks way to bright and almost more like a bright pink.
How would I get a peach color and a lighter peach at that?
Thanks everyone! This is my first post!!! 
Love this site.
If you are near a Michaels or any store that sells Wilton products they have a Whitener that you can use. It is usually right next to the frostings on the cake aisle. I have used it to tone down a bright red and got it just where I needed it.
Good luck,
Kim
Well to save some of your hard work - mix maybe 1/3 cup of your pink/peach to 1 cup white icing. Keep playing w/that combination until you get the shade you are looking for. You might have to add just the tinest bit of yellow to tone down the pink. And I mean tinest bit....like just touch a toothpick to the color and mix that into the icing.
This should teach you to start w/the smallest amount of color - you can always add more if necessary but it's hard to lighten it up w/over done
I made a peach by accident once. I was playing around with colors in my bag - striping and making roses. Well they all mixed together and I got peach. Make a test batch with yellow, pink and white. Try the buttercup yellow - it is orangier than it is yellow. If you are going for pastels add very little as the colors are strong. You may be better off making a small bowl of bright pink and a small bowl of orange and then mixing the colored buttercream into the big batch 1 tsp. at a time and see how it turns out instead of adding the coloring directly to the whole batch.
What about copper? Just a touch (and I mean... a touch!) I always seem to get a light peachy colour.
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