Red
The red cloth would appear red when illuminated by red light. This is because the color of an object we see is the color of light that it reflects, and red cloth reflecting red light would retain its original red appearance.
A yellow cloth illuminated with direct sunlight would appear yellow, with its color looking bright and vibrant due to the full spectrum of light present in natural sunlight.
It would depend on whether or not the dye for the cloth was developed in natural light , sunlight is a natural light , light created by some forms of man made light give off their own spectrum of color , a dye developed under these types of light would not appear the same in sunlight. But generally most dyes are quality controlled to appear as they should under natural light.
The yellow cloth would appear dark under cyan light, as cyan light absorbs yellow. It would appear brownish-gray under blue light, as blue light is the opposite of yellow on the color wheel and would cancel it out.
Under blue light, red cloth will appear darker and more muted in color compared to how it appears under normal or white light. This is because red is opposite to blue on the color wheel, creating a contrast that can alter our perception of the red cloth's color when illuminated by blue light.
The red cloth would appear red when illuminated by red light. This is because the color of an object we see is the color of light that it reflects, and red cloth reflecting red light would retain its original red appearance.
A yellow cloth illuminated with direct sunlight would appear yellow, with its color looking bright and vibrant due to the full spectrum of light present in natural sunlight.
It would depend on whether or not the dye for the cloth was developed in natural light , sunlight is a natural light , light created by some forms of man made light give off their own spectrum of color , a dye developed under these types of light would not appear the same in sunlight. But generally most dyes are quality controlled to appear as they should under natural light.
The yellow cloth would appear dark under cyan light, as cyan light absorbs yellow. It would appear brownish-gray under blue light, as blue light is the opposite of yellow on the color wheel and would cancel it out.
Under blue light, red cloth will appear darker and more muted in color compared to how it appears under normal or white light. This is because red is opposite to blue on the color wheel, creating a contrast that can alter our perception of the red cloth's color when illuminated by blue light.
Black
It appears red. That's the main reason it's called "a red cloth".
A blue object appears black when illuminated with light because it absorbs most of the light that hits it, including the blue light that gives it its color. This absorption of light prevents the object from reflecting enough light to appear blue, making it appear black instead.
I'm assuming green because yellow and blue mixed together (I know you aren't mixing colors) makes green. It might just look like a yellow cloth under blue light, with no change at all. But I could be wrong.
A red sheet of paper will appear black when illuminated with cyan light, which is the complementary color of red. When the paper is exposed to cyan light, it absorbs all the complementary color wavelengths and reflects none, making it appear black.
The cloth would be wite because if it were any other color the colored light would mix with the color of the cloth and make a different color.
The object appears to have the color of the light that it is worst at absorbing. That'sthe color of which the most light remains to be scattered and reflected to your eye.