NOT MY LORA, ALL CREDITS GOES TO THE RESPECTIVE AUTHOR: https://civitai.com/models/76732/easy-sticker
Trigger words
sticker, monochrome, color
Also both color styles can be added to negative prompt, for example if images look's kinda unsaturated, add monochrome to negative and vice versa.
I highly recommend to add die-cut sticker, {main object} sticker, sample background and if it is needed cartoon, minimalism, solid outline.
Settings
Sampler: Euler a
Steps: 20-40 (depends on model and other LoRa's your use)
CFG: 5-7 (again, depends on model and other LoRa's your use)
LoRA weight: 0.8-1.3 (you can start with 1.0 and adjust for your case)
All examples were generated with Dreamshaper and AnythingV3