A4 color page design color mode

Quick answer：

A4 color page design refers to the creation of colorful documents or visual content designed to be printed on an A4-sized paper. The color mode in design refers to the color profile or setting used to define how colors are represented and displayed. Common color modes include CMYK (Cyan, Magenta, Yellow, Black), which is typically used for commercial printing, and RGB (Red, Green, Blue), which is used for digital displays. Choosing the correct color mode is crucial for ensuring the final print or digital output matches the intended design.