Circular color-correction control: hue is the angle, saturation the radius. Found in DaVinci Resolve and Baselight as the primary tool for lift, gamma and gain.
Definition
The Color Wheel is a method in modern color correction and grading software. It provides an intuitive, circular control interface where:
- Angle: Determines the hue - from red through yellow, green, cyan, blue to magenta
- Radius (Distance): Determines the saturation - from neutral in the center to maximum saturation at the edge
- Center: Black point for neutral, desaturated color
The color wheel enables simultaneous adjustment of hue and saturation in a visual interface, allowing more intuitive work than separate RGB sliders.
Historical Context
Origins in Analog Technology
The color wheel concept stems from analog television production:
- 1960s: Analog colorizer devices with mechanical wheels
- 1980s: Digital transition with first software-controlled wheels
- 2000s: DaVinci and other grading systems perfect the interface
Modern Software Implementation
DaVinci Resolve (since v12):
- Three wheels: Shadows, Midtones, Highlights
- Lift/Gamma/Gain Model
- Offset/Power/Slope Model
Adobe Premiere/AE (Lumetri):
- Simple wheel interface
- Curve-based implementation
Final Cut Pro:
- Color Wheels since 10.4.1
- Simplified interface similar to DaVinci
Technical Operation
Mathematical Foundations
The color wheel is based on HSL or HSV color space:
HSL (Hue, Saturation, Lightness)
- Hue: 0-360 degrees (angle)
- Saturation: 0-100% (radius)
- Lightness: 0-100% (separate dimension)RGB to HSL Conversion:
Max = max(R, G, B)
Min = min(R, G, B)
L = (Max + Min) / 2
S = 0 (if L = 0 or 1)
S = (Max - Min) / (2 - Max - Min) (if L > 0.5)
S = (Max - Min) / (Max + Min) (if L ≤ 0.5)
H = 0 (if Max = Min)
H = 60 * ((G - B) / (Max - Min)) + 0 (if Max = R)
H = 60 * ((B - R) / (Max - Min)) + 120 (if Max = G)
H = 60 * ((R - G) / (Max - Min)) + 240 (if Max = B)Visual Representation
Color Wheel Arrangement:
Red (0°)
|
Magenta--|--Yellow
|
Cyan (180°)Standard HSL Color Wheel:
- Red: 0°
- Yellow: 60°
- Green: 120°
- Cyan: 180°
- Blue: 240°
- Magenta: 300°
Lift / Gamma / Gain Model
The classic color wheel model in DaVinci uses Lift/Gamma/Gain:
Shadows Wheel (Lift)
Definition:
- Adjusts the darkest pixels (black point)
- Black Lift: Raises the blacks (less contrast, milkier)
- Adding color: Tints the shadows
Practical Application:
- Lift Red: Shadow area becomes reddish
- Lift Cyan: Shadow area becomes blue-green
- Lift in the center: Neutral brightening
Grading Tips:
- Usually adjust very subtly
- Too much lift leads to a "flat" image
- Often used for skin tone calibration
Midtones Wheel (Gamma)
Definition:
- Adjusts mid-tone values (18% gray)
- Largest impact on visual perception
- Color cast is most visible in midtones
Practical Application:
- Gamma Red: Midtones become warmer (reddish)
- Gamma Cyan: Midtones become cooler (bluish)
- Greatest creative flexibility
Grading Tips:
- Strongest visual effect
- Skin tones usually adjusted via gamma wheel
- Most creative work happens here
Highlights Wheel (Gain)
Definition:
- Adjusts the brightest pixels (white)
- Affects specular highlights and bright objects
- Often subtle for premium grading
Practical Application:
- Gain Red: Highlights become warmer
- Gain Blue: Highlights become cooler
- Frequently adjusted for practical light/candlelight
Grading Tips:
- Caution: Overly aggressive changes look unnatural
- Often used for creative looks (e.g., orange-blue contrast)
- Color temperature adjustment
Workflows with Color Wheels
Scenario 1: White Balance Correction
Shot under artificial light (tungsten, 3200K) instead of daylight (5600K):
On Set (with monitoring software):
- Look at color wheel
- Color is too warm/reddish
- Shift Gamma wheel toward Cyan
- Until skin and whites look natural
In Grading:
- Open DaVinci
- Use Midtones Wheel (Gamma)
- Shift toward Cyan until white point is correct
- Optionally reference with eyedropper on white
Scenario 2: Creative Color Grading
Warm, orange-tinted scene (e.g., sunset, bar):
Process:
- Shadows (Lift Wheel): Add slight warmth (orange)
- Midtones (Gamma Wheel): Stronger warmth for main effect
- Highlights (Gain Wheel): Optionally cool (blue) for contrast
Result: Warm shadows and midtones, cool highlights (orange-blue contrast)
Scenario 3: Skin Tone Matching
Multiple actors in different lighting situations:
- Reference Shot: Establish skin tone as reference
- Other Shots: Match against reference using Gamma wheel
- Wheel Position: Should be similar for all
- Tracking: Notes for consistency across takes
Offset / Power / Slope Model
Alternatively, some systems use Offset/Power/Slope:
DaVinci Resolve Advanced Controls
Offset:
- Additive color correction
- Similar to Lift, but with different mathematics
- Affects all tonalities evenly
Power:
- Multiplicative correction
- Exponential effect on brightness
- Similar to Gamma, but not identical
Slope:
- Contrast adjustment
- Steepening of the curve
- Useful for tone separation
Practical Grading Tips with Color Wheels
Rule 1: Cool Shadows, Warm Highlights
Classic cinema grading:
- Shadows (Lift): Slightly cyan/blue
- Highlights (Gain): Slightly warm/orange
- Creates emotional contrast and depth
Rule 2: Skin Tones via Midtones Wheel
- Skin tone sensitivity is highest in the midtones
- Most adjustment should happen here
- Dose shadows and highlights more finely
Rule 3: Saturation Before Color Grading
Workflow:
- First set exposure/contrast correctly (with curves)
- Then add color via color wheels
- Don't adjust saturation and hue extremely at the same time
Rule 4: Less Is More
- Color wheel adjustments are very visually obvious
- Subtle adjustments (small radius movements) look more realistic
- Too much color grading looks artificial and "graded"
Common Mistakes and Corrections
| Mistake | Symptom | Solution |
|---|---|---|
| Skin tones too red/magenta | Skin looks unnatural | Shift gamma toward cyan, not red |
| Image overall too saturated | Colors look exaggerated | Reduce saturation globally (separate slider) |
| Color wheel adjustment looks flat | Black point too high | Reduce lift, use contrast curve |
| Too much color grading | Image looks unnatural | Reduce radius movement |
| Inconsistent colors across scenes | Each scene looks different | Establish shot references and compare |
Integration with Other Grading Tools
Relationship to Curves
Color Wheel (fast, intuitive):
- Perfect for quick adjustments
- Good feel for direction
- Limited precision
Curves (precise, detailed):
- Fine control over tone curve
- Individual RGB channels adjustable
- More time-consuming, but higher control
Combination:
- Initial adjustment with color wheel (find direction)
- Fine-tuning with curves (precision)
Relationship to HSL/Saturation Controls
Color Wheel:
- Adjusts colors in shadows/midtones/highlights
- Hue + saturation in one movement
HSL Saturation Controls:
- Saturation global or per hue range
- For specific color correction
Workflow:
- Color wheel for overall mood
- HSL for selective color adjustment (e.g., saturate only reds)
Monitoring and Visualization
Scope Tools for Color Wheel Control
Vectorscope:
- Shows color position on the wheel
- Helps verify white balance
- Is a 2D projection of color wheel space
Parade:
- Shows RGB channels separately
- Check if red/green/blue are balanced
- Complementary to color wheel
Waveform Monitor:
- Shows brightness (tonality)
- Complementary to color wheel (shows color)
- Together both tools provide complete control
Summary
The color wheel is the most intuitive and fastest tool for color correction in modern grading software. The combination of hue selection (angle) and saturation (radius) enables quick, effective adjustments. Professional colorists use color wheels as the first quick tool before more precise adjustments with curves and other controls. Understanding the Lift/Gamma/Gain model is essential for professional grading.