Hand-illustrated UI trades pixel perfection for warmth — sketchy borders, organic shapes, and illustration-first storytelling.
Irregular radii and dashed lines signal "someone drew this."
Cream, terracotta, and ink brown — cozy, not corporate.
Handwritten headlines paired with friendly sans body copy.
Trend context: Hand-illustrated web — Notion's early charm, Mailchimp's personality, and the anti-AI-slop movement toward human craft.