VAE with higher gamma to prevent loss in dark and light tones.
Complete article explaining how it works
https://civitai.com/articles/462
Package contents :
Checkpoint SD 1.5: https://civitai.com/models/87371
Embedding NEGATIVE: https://civitai.com/models/87375
Lora DETAIL: https://civitai.com/models/87378
Lora PHOTO: https://civitai.com/models/87376
Lora Dark Theme (THIS): https://civitai.com/models/87575
VAE RAW (THIS): https://civitai.com/models/88390
More examples here :