Regarding pigments, you mix red and blue, but a certain amount more red than you would use in purple, for instance.
Because oven cleaner contains Sodium Hydroxide (Na OH), a 'strong' alkali/base, to dissolve the grease, it would change Universal Indicator a deep blue/purple colour.
If you mix red and blue you will get purple. It is difficult to mix them in perfect proportion, but that is how you get the most common shade of purple. If you use more red it will be warmer and if you use more blue it will be cooler.
There are different types of Litmus paper and so the exact color may differ for each of these types. Also, water itself is neutral when pure but most tap water is slightly basic so it depends on what you use. Some types of Litmus paper will not change color in pure water (such as the 1-12 pH yellow litmus paper), others will turn a purple color as an indication of the solution being not an acid (red) or a base (blue).
red and black if you don't have red use pink, black and a little dark purple welcome What proportion of red to black and dark purple? thanks for help
Blue and red together make purple. For a different shade of purple you can change the shades of blue and red or use more of one color than the other.
Purple.Purple or Violet.Purplepretty colors. aka purple
You can mix colors up as in purple and a red color from sally's and the same colorline.
Mix red & blue together.
A shade of red. It depends on the shade of red you start with and how much black you use. It can turn an ugly brown color. Be careful.
The Tradition color is red but you can use white.
You can use pink, maroon, peach, or any other color with red in it instead. If you don't have those, it is impossible.
Red is a primary color. You cannot make red by mixing any other colors. You can use red to make orange (with yellow) or purple (with blue).
There are dyes and gels that you can use to change the color of plain vanilla (white icing). Or you can try mixing some colors on your own. Use regualr food colorings (green, yellow, blue, red) and try mixing a few drops to create a dark grey or black color. Some hints are that red + blue = purple, green will make purple darker.
Red is a primary color. You cannot make red by mixing any other colors. You can use red to make orange (with yellow) or purple (with blue).
Regarding pigments, you mix red and blue, but a certain amount more red than you would use in purple, for instance.
Because oven cleaner contains Sodium Hydroxide (Na OH), a 'strong' alkali/base, to dissolve the grease, it would change Universal Indicator a deep blue/purple colour.