Define your illustration style once, then generate unlimited on-brand images that all look like the same artist made them.
Flat vector illustration in a consistent brand style: {SUBJECT/SCENE}. Style rules: {N}-color limited palette ({LIST HEX CODES}), bold {THICK/THIN} outlines in {COLOR}, simple geometric
shapes, {ROUNDED/SHARP} corners, subtle grain texture, generous negative space. Characters (if
any): diverse, friendly, simplified faces with dot eyes, no photorealism. Background: {SOLID COLOR / SIMPLE SHAPE MOTIF}. Composition: centered subject, breathing room on all sides, suitable as a {BLOG HEADER / APP ILLUSTRATION / SOCIAL POST}. Same style every time — this is one image from a larger brand set.
TIP: Save this prompt. Change only the {SUBJECT/SCENE} each time to keep every image on-brand.