Color mixer
The color mixer is a building used to mix paints not available from resource nodes. When the two inputs are supplied with a single paint each, the mixer outputs a new paint determined by the color mixing table. Because redundant recipes still output one paint, some recipes are more wasteful than others — for example, to get white, it is better to mix a secondary color and the complimentary primary color rather than two secondary colors.
The mixing logic behaves according to additive color rules, making red, green, and blue primary colors. The building icon can be used as a Venn diagram guide representing the inputs required for a given color.
Mechanic
In lieu of black as with light, a grey color called "uncolored" represents a complete lack of color. Despite not being obtainable legitimately in-game, it is included in the following table for completeness.
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Internally, color recipes are computed by regarding each color as a combination of 1-3 primary colors, using a bitwise OR operation to find each combination.