There are no colors. No one is objectively "black" or "white," just as apples and fire engines aren't red, the sky isn't blue, and the sea isn't blue either. The universe has light in different wavelengths and color vision depends upon how our brain perceives the light of different wavelengths. Technically colors are the illusion created by our brain.
What is a color?
Color is the property of an object or a substance that determines how it appears to the human eye. It is a visual perception that is created by the way light reflects or absorbs off of an object. Colors are typically described by their hue (such as red, blue, or yellow), saturation (how intense or pure the color is), and brightness (how light or dark the color appears). The perception of color is a result of the interaction between the physical properties of light and the biological and psychological processes of the human visual system.
Color is a visual property that arises from the interaction between light and matter. When light encounters an object, some of the wavelengths are absorbed by the object, while others are reflected or transmitted. The wavelengths that are reflected or transmitted determine the color of the object that we see. For example, a red apple appears red because it reflects mostly red wavelengths of light while absorbing other colors.
The human visual system perceives color through specialized cells called cones that are located in the retina of the eye. These cones are sensitive to different ranges of wavelengths of light, which allow us to see a range of colors. The cones send signals to the brain, which processes the information and creates our perception of color.
Colors are typically described in terms of hue, saturation, and brightness. Hue refers to the specific wavelength of light that a color represents, such as blue or green. Saturation refers to how intense or pure the color appears. A highly saturated color appears vivid, while a desaturated color appears muted. Brightness refers to how light or dark a color appears, with brighter colors appearing lighter and darker colors appearing dark.
What will be the color of an object if we don't look at them?
The color of an object does not depend on whether or not we are looking at it. An object's color is a property of the object itself and is determined by the way that it reflects or absorbs light. Even if nobody is looking at an object, it still reflects and absorbs light in the same way, and therefore still has the same color.
However, our perception of an object's color does depend on whether or not we are looking at it because color is a subjective experience that is created by our visual system. If nobody is looking at an object, it doesn't change the object's color, but it does mean that nobody is perceiving its color.