1. Understanding Colored Gels
* What are they? Transparent sheets of colored plastic designed to be placed over lights to alter their color. They come in various sizes and can be cut to fit your lights.
* Color Theory Basics: A basic understanding of color theory will help you make informed decisions about color combinations. Consider:
* Complementary Colors: Colors opposite each other on the color wheel (e.g., red & green, blue & yellow) create contrast and visual excitement.
* Analogous Colors: Colors next to each other on the color wheel (e.g., blue, blue-green, green) create a harmonious and calming effect.
* Warm vs. Cool Colors: Warm colors (reds, oranges, yellows) evoke warmth and energy. Cool colors (blues, greens, purples) evoke coolness, calmness, and sometimes sadness.
* Gel Strength (Density): Gels are sometimes rated based on how much light they block. This affects the intensity of the color. Experiment to find the right strength for your desired look.
* Gels vs. Color Correction Filters: Colored gels are primarily for *creative* color shifts. Color correction filters (like CTO/CTB - Color Temperature Orange/Blue) are used to adjust the color temperature of your light to match your camera's white balance. You *can* use CTO/CTB creatively, but their main purpose is different.
2. Equipment You'll Need
* Colored Gels: A set of gels with a variety of colors is a good starting point. You can buy pre-made kits or individual sheets. Rosco and Lee Filters are popular brands.
* Lights: Strobes (studio flashes) or continuous lights (LED panels, etc.) can be used. Strobes are generally more powerful and offer more control, but continuous lights allow you to see the effect in real-time.
* Light Stands: To position your lights.
* Gel Holders/Clips/Gaffer Tape: To attach the gels securely to your lights. Many lights have built-in gel holders. If not, gaffer tape is your friend! Make sure the tape doesn't melt onto your light if it gets hot.
* Modifiers (Optional): Softboxes, umbrellas, grids, snoots, reflectors - these shape and control the light even further and can be used in conjunction with gels.
3. Basic Setups & Techniques
* Single Light with Gel:
* Basic: Place a light with a colored gel to the side or in front of your subject. This creates a simple, yet effective, wash of color. Experiment with different colors and angles.
* Rim Light: Position a light with a gel behind your subject to create a colored rim light. This separates the subject from the background and adds a dramatic halo.
* Two Lights with Different Gels:
* Complementary Colors: Use two lights with complementary gels (e.g., red and green) to create a dynamic and visually striking image. Position them on opposite sides of your subject.
* Analogous Colors: Use two lights with analogous gels (e.g., blue and purple) for a more subtle and harmonious effect.
* Background Light: Use one light with a gel to illuminate the background and another light (with or without a gel) to light your subject. This creates depth and separation.
* Three or More Lights (Advanced):
* This allows for even more complex lighting scenarios. You can use one light as a key light (main light), one as a fill light, and others to add color, rim lighting, or background effects.
* Think about layering colors and creating gradients.
* Color Blocking: Aim to fill different zones of your image with specific colors. Good use of gradients can help create separation in the space between you and your subject and also the background.
* Using Gels to Mimic Environmental Light: Use gels to add subtle colour shifts to the environment such as mimicking the look of sunlight by adding a subtle yellow gel to your key light.
4. Practical Tips & Considerations
* White Balance: Set your white balance *after* you've added the gels. Use a gray card or color checker to ensure accurate color rendition. You may need to adjust this in post processing also. Setting it manually can help you achieve more consistency in a shoot.
* Light Placement: Experiment with the position of your lights. Moving them closer or further away will change the intensity of the color and the size of the light source.
* Metering: Use a light meter to measure the light output of each light. This will help you balance the exposure and avoid overexposing or underexposing your images. If you don't have a light meter, use your camera's histogram as a guide and take test shots.
* Diffusion: Use softboxes or umbrellas to diffuse the light and create a softer, more flattering look.
* Model's Skin Tone: Be mindful of how different colors affect your model's skin tone. Some colors can make skin look sickly or unnatural. Experiment to find colors that complement your model's complexion.
* Wardrobe and Makeup: Coordinate the wardrobe and makeup with the colors of the gels. This will help create a cohesive and visually appealing image. Neutral clothing can work well as a backdrop for the coloured light.
* Experimentation is Key! Don't be afraid to try different color combinations and lighting setups. The best way to learn is to experiment and see what works best for you.
* Safety: Be careful when handling hot lights. Use heat-resistant gels and ensure they are securely attached to the light. Avoid touching the light directly after it has been turned on.
* Post-Processing: Color correction and grading can be used in post-processing to further refine the colors and enhance the overall look of your images.
* Communicate with your Model: If the shoot is long, check with your model that the colours of the lights are not causing eye strain or headaches. Also be clear in advance as to the creative direction.
5. Creative Ideas & Inspiration
* Abstract Portraits: Focus on shapes, colors, and patterns rather than a traditional portrait.
* Dramatic Silhouettes: Light the background with vibrant colors and let your subject be a silhouette.
* Film Noir Inspired: Use deep reds and blues to create a classic film noir look.
* Fantasy/Sci-Fi: Use otherworldly colors like greens, purples, and blues to create a fantasy or sci-fi vibe.
* Mood Lighting: Use colors to evoke specific emotions (e.g., blue for sadness, red for passion).
* Color Contrasts: Combine unexpected color combinations for a unique and visually arresting look.
* Use Gels in combination with gobos: Add textures/patterns with gobos on top of the coloured light.
Example Setups:
* Simple Drama: One light with a deep blue gel aimed at the background, and a second light with a warming CTO gel on the subject.
* Cyberpunk: Red and blue gels on separate lights aimed at the subject from opposite sides, creating a strong color clash.
* Dreamy Aesthetic: Pink and lavender gels on two lights, diffused with a softbox, create a soft and ethereal feel.
By understanding the principles of color theory and experimenting with different lighting setups, you can use colored gels to create truly unique and creative portraits that will stand out from the crowd. Good luck and have fun!