Start with warm emotions
Cute packs often work well with love, shy, thank you, please, sleepy, happy, excited, proud, crying, and small apology reactions.
Use simple shapes
Rounded silhouettes, clear eyes, and soft gestures make a cute sticker readable without losing the gentle tone.
Add contrast where it matters
A soft palette can still use strong outlines and small accent colors. Contrast helps the sticker remain visible on different chat backgrounds.