Adding the element strontium to a color pyrotechnic mix produces a red flame; copper, blue; barium, green; and sodium for yellow. Too much or too little of the chemicals make significant changes ...

When you mix blue and yellow ... For RGB colors that can’t be made up purely with pigments, there’s also a special “residual” term that accounts for “the missing part of red, green ...

Gently add one or two drops of red, blue, and yellow ... swab down longer, the color should swirl up from the bottom of the plate. When you touch the food coloring at the edge of the plate, the color ...