Generally speaking, "pink" refers to a very light red, referred to as pink. See figure:
(Pink appears in the middle of the picture above)
But purple is a mixture of red and blue, and purple plus white becomes light purple, referred to as pink purple. See figure:
Because pink purple has blue components, pink purple still belongs to purple, not pink.
In addition, purple is composed of red and blue, so there are different purples, such as red purple (red is a little more blue) and blue purple (blue is a little more red). Red purple is biased towards red, but it does not belong to red, and blue purple is biased towards blue, but it does not belong to blue. Whether it is red, purple, red, blue or purple, it belongs to purple.
Because pink is red and white, pink purple can't belong to red powder.
Color is the visual perception of light through eyes, brain and our life experience. The light we see with the naked eye is produced by electromagnetic waves with narrow wavelength range, and electromagnetic waves with different wavelengths show different colors. The recognition of color is the visual nerve feeling produced by the naked eye under the stimulation of electromagnetic wave radiation energy.
Color has three characteristics, namely hue, lightness and saturation. The three characteristics of color and their relationship can be explained by color solid in three-dimensional space.
Source: Baidu Encyclopedia-Color