ColorForge

ColorForge is a color tools plugin for OBS Studio. 

Today it includes:

RGB Curves filter 

Allows you to for example apply an S-curve or lift just the midrange colors.

• Point-based curve editing
• Movable endpoint handles with flat edge plateaus
• Separate neutral and RGB curves
• Live effect updates in OBS while editing
• Histogram overlay from the real source behind the filter
• Channel-aware histogram view for Neutral / Red / Green / Blue
• Live preview inside the editor
• Saved curves with load, save, rename, delete, export and import

Hue Curves filter 

Allows you to select a color on the spectrum and adjust it's hue, saturation or luma.

• Hue vs Sat, Hue vs Hue and Hue vs Luma curves
• Live hue-based grading through a dedicated OBS filter
• Live editor preview and hue histogram

Color Range Correction filter 

Allows you to create a mask (invertable) of for example skintones

• Hue, saturation and luma range keying
• Soft-edge falloff on all three ranges
• Preview modes for final image, matte and Color / Gray isolation