The color of the plastic in a microwave can vary depending on the specific microwave model and brand. In most cases, microwave interiors have a white or off-white color. This color is chosen because it helps to reflect microwaves and distribute them more evenly throughout the cooking chamber.
The exterior of microwaves can come in a wide range of colors, including black, silver, stainless steel, white, red, and more, to match various kitchen aesthetics and preferences. However, the interior is typically designed to be white or off-white to optimize the microwave's performance and cooking efficiency.