You wanna generate girls/boys with moderately tanned healthy skin?
You wanna generate them without using "dark skin"or "tanned skin" prompts?
Try this LoRA!
This LoRA tentatively works with photo-like model but maybe its not optimized because I like to generate illustrations better so verification may not be adequate.
If you want to generate girls/boys with darker skin,try Chocoskin LoRA that I developed.
https://civitai.com/models/81176/chocoskin
"dark skin"などのプロンプトを使わずに、適度に日焼けした小麦色の肌の人物の画像を生成できます。イラストだけでなく実写系のモデルなどにも使えると思います。