Is it possible to color the milk chocolate or semi-sweet chocolate.? I have candy colors & powdered red. I want red hearts for Valentine's Day, but I really want them to be chocolate not the white chocolate.

i don't think you can color chocolate unless you want black. maybe you can flavor the white chocolates to take like milk chocolate?

Its not possible because the brown of the chocolate is too dark. You could maybe try making hearts from milk chocolate, then dipping them in a thin coating of red white chocolate - this should be ok as long as you chill the milk hearts first so they dont melt in the white and mix colours.

I have also seen places sprinkle chocolate with a kind of red dust once dried to give it a red appearance on the surface. I have absolutely no idea what this is, but it tastes like some kind of red sugar.

If you are using real chocolate, not the candy mold stuff, you need to make sure that your coloring is either powder or FAT BASED. The old standard coloring liquid/gels are water based, and your melted chocolate will seize, because, well, that's what water does to melted chocolate.

-Kristy

Just adding a comment of an experience I had the other week with trying to colour chocolate!
I tried to add red food colouring to melted choc that I was to use for piping on slices. But my desired rosey red shade disappeared and became a mahogony brown! So I started experimenting further & I tried Purple. It seemed to work & turned a dark rich purple BUT then started to colagulate?...[Is that the word?] ..so I shrieked & reached for the milk in the fridge, added a splotch & stirred like crazy & voila it got smooth again... Phew!
And so I was able to pipe deep browny purple designs on light choc slices. Turned out well! But a lil runnier than desired so I had to work fast! But the after effect was great with dark deep purple!

I do like the idea mentioned here of dipping the milk choc into White thats been tinted red/pink! How lovely!

Happy early St Vs day! Hope all works out for you!

You can use colored coca butter in a air brush or even in a wagner painter. Look on Chefrubber.com. You can find just about any color you want there.

If you are using a mold, you can put a thin layer of red-colored white chocolate (or red candy melts) into the mold first. You can put it on with a brush. Let that harden, then put in your milk chocolate (make sure it is not hot, as queenarmadillo said).
Good luck!