Seven colors in the same color family

Quick answer：

In the context of color theory, a 'color family' refers to a group of colors that share similar characteristics, such as similar hues or saturation. The term 'seven colors in the same color family' might refer to a palette of colors that are all derived from a common hue, with slight variations in saturation or brightness. This concept is used in design, art, and fashion to create cohesive and harmonious color schemes.