Guidance and prompts for using Style Reference code
--sref 441822729

Color:

This style use a purely black-and-white palette, avoiding complex color combinations and emphasizing the shapes and content. This minimalist approach highlights the purity and historical charm of the illustrations.
Lines:

The lines are clean and smooth, with a focus on intricate details, such as facial features, tree branches, and car outlines. The variation in line thickness adds depth and dimension to the artworks.
Composition:

The compositions are straightforward and natural, with well-balanced distributions of characters and scenes. The backgrounds are deliberately kept minimal, ensuring the focus remains on the main subjects, reflecting the aesthetics of mid-20th-century advertisements or educational illustrations.
Themes:

This style depict everyday life scenes, including portraits, park activities, a strolling woman, and a classic car. These elements showcase the fashion, social habits, and technological advancements of the mid-20th century.

Visual Design and Packaging for Retro Brands:

This style can enhance the charm of brands focused on retro or classic themes, such as food packaging, cultural goods, or apparel brands. It allows the brand to tell its story and attract consumers interested in nostalgic cultural experiences.