You'll need to play with it some but, for starters use about 10 drops of yellow to 1 drop of red. Test it on a cracker before you mix it all with your food.
10 yellow 1 red
Red mixed with a little water will make a pink color. If you are making icing, add a drop of two of red food coloring to white icing in order to turn the icing pink.
by putting food coloring into water
Blue and Gold make green
A mustard color
Yes this site has instructions.instructables.com/id/how-to-color-stuff-without-food-coloring/
hell no. looks can be decieving. Food coloring is only used to make food look more appealing.
Brown
food coloring
10 yellow 1 red
All things being equal, color of food coloring will not make a difference. If the ingredients used to make the coloring are different, then there may be a slight difference. This would be a great science experiment.
Brown may be produced by combining red and green food coloring. It would be wise to make a small test batch to determine the proportion of each color.
the chlorplasts trap in the color to make it change
It is a main source of color you choose to put in the water and make it the color
You can't make red, it is a primary color
Red and blue make purple.
The only way you can make it gray with food coloring is if the substances you are making the volcano out of is white. You will have to add black food coloring drop by drop until you have the color gray you want. If you can't find black food coloring, mix every color you have together then drip it in. All of the colors mixed together will make black.