LuttieRGB Curves — Professional Tone Control in Your Browser
The RGB curves panel is the most powerful tonal control in professional color grading software. The same workflow used in DaVinci Resolve, Premiere Pro, and DaVinci Fusion — master channel plus individual R, G, and B curves — runs directly in Luttie's browser editor. No software to install, and every curve adjustment exports as a precise .cube LUT.
Four channels, complete tonal control.
Control overall luminance — brighten highlights, deepen shadows, and set the overall contrast of the image.
Lift or pull red in specific tonal ranges. Boosting reds in shadows warms up your dark areas; pulling them creates a teal-shadow look.
Green affects both luminance and color balance. Subtle green adjustments are a key part of film-emulation grades.
Boosting blue in highlights creates cool, airy looks. Pulling blue from midtones produces a warm, golden-hour feel.
Frequently asked questions
What are RGB curves in color grading?
RGB curves are a remapping tool. The horizontal axis represents input values (how bright or saturated a color is in the original), and the vertical axis represents output values (how bright or saturated you want it to be in the result). By adding control points and dragging the curve up or down, you reshape the relationship between input and output for each channel. The master curve affects luminance across all channels; the individual R, G, B curves let you push or pull specific hues in specific tonal ranges.
How do RGB curves differ from Lightroom curves?
Functionally, Luttie's RGB curves work the same way as Lightroom's Tone Curve panel. The main difference is that Lightroom's parametric mode uses named sliders (Shadows, Darks, Lights, Highlights) instead of free-drawn curves, which limits flexibility. Luttie's curves panel uses the same free-draw model found in DaVinci Resolve and Premiere Pro — every point is draggable, giving you precise per-channel control over any tonal range.
Can I export my RGB curves as a LUT?
Yes. Every adjustment you make in Luttie — including all curve modifications — is baked into the exported .cube LUT. The LUT captures the full color transformation as a 3D lookup table, so applying it in DaVinci Resolve, Premiere Pro, Final Cut Pro, or CapCut produces exactly the same result as what you see in the Luttie editor.
Start grading with RGB curves — for free.
No DaVinci Resolve, no Premiere Pro license needed.
Open the RGB curves editor