What is your favorite brand of color and do you use gel or powder? I think there is also paste? This would be for IMBC and for fondant/gum paste. I'm looking for vintage colors....mint, blush, ivory?? Picture Cotton and Crumbs work. 

For IMBC I'd use an oil-based candy color. for fondant and gumpaste I use gels, pastes, whatever. I don't have any loyalty to one brand or another, I jut sue whatever color is closest to what I'm looking for.

I like AmeriColor for fondant/gum paste and FDA approved powdered colors [sugarpaste.com, thesugarart.com, pristinepowders.com] for IMBC. 

I try not to buy specialty colors, if possible, and often play around to mix my own.  This chart might help [I haven't really used it--I'm a "by the eye" person]

Creating Vibrant Colors with our Americolor Gel Paste

Depending on the amount of icing you are using, you will need to gauge the amount of Americolor gel paste drop. Use the ratios as a guide.

Apricot = 2 orange + 1 egg yellow

Avocado = 4 lemon yellow + 1 leaf green + a touch of black

Burgundy = 5 bakers rose + 1 violet

Chartreuse = 5 lemon yellow + 1 leaf green

Copper = 1 egg yellow + 1 brown + 1 Christmas red

Coral = 3 rose pink + 2 lemon yellow

Dusty Rose = 2 Christmas red + 1 brown

Gold = 10 lemon yellow + 3 orange + 1 Christmas red

Plum = 1 violet + a touch of Christmas red

Maroon = 4 red red + 2 burgundy

Ivory = 1 liquid whitener + a touch of brown + a touch of egg yellow

Jade = 1 leaf green + 1 royal blue + a touch of black

Lavender = 5 pink + 1 violet

Marigold = 3 lemon yellow + 1 orange

Melon = 1 orange + 3 bakers rose

Moss Green = 2 violet + 3 lemon yellow

Navy Blue = 1 sky blue + 1 violet

Persimmon = 1 orange + 1 bakers rose

Grape = 1 sky blue + 6 bakers rose

Raspberry = 3 bakers rose + 1 christmas red

Ruby Red = 1 holiday red + a touch of black

Rust = 8 orange + 2 red red+ 1 brown

Sea Gold = 2 sky blue + 1 leaf green

Silver = 1 black + 1 blue

Skintone = 12 orange + 4 bakers rose + 1 royal blue

Teal = 9 sky blue + 1 lemon yellow

Turquoise = 6 sky blue + 1 lemon yellow

Wine = 3 Christmas red + 2 rose pink