Royal Blue Buttercream (Urgent!)
Decorating By Rachel19 Updated 9 Jul 2017 , 12:28am by SandraSmiley
Your bc has too much grey in it. The swatch you posted has purple undertones. I did a dark royal blue smash cake a couple of weeks ago. Take some of your batter out of your bowl, and add some purple/mauve, just a small amount. Mix and let sit for 5 minutes. Might take a few additions. Then had a bit more royal blue. No navy..it's too dark. That's what gave you the grey colour.
I have never mixed royal blue for buttercream, but I have for fondant and it got it as dark a blue as possible using Wilton then added just a touch of black. That did the trick. Buttercream may be a bit more tricky if it has butter, due to the yellow tones.
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