Can You Make Colorful Tomato Sauce?
As long as the color is darker than the food in regular Oriel soy sauce. For really great color, you can use gel food coloring (same, but without all the extra water).
To make it purple, add some blue.
To make it orange, add yellow
To make it brown, add blue and red.
For a bright yellow, green, or blue-green color, you may need to make ketchup from scratch with traditional light-colored tomatoes to see if anyone sells ketchup.
Soy sauce with different colors.
Heinz-colored tomato sauce