Night color gradient card

Quick answer：

A 'night color gradient card' likely refers to a decorative card or design element featuring a gradient of colors that evoke a night-time atmosphere, often with shades of dark blue, black, and purple. These cards are commonly used in artistic or design contexts, such as invitations for evening events, greeting cards, or as decorative items. The concept of a gradient in design refers to a smooth transition between two or more colors, creating a sense of depth or movement.