If you have ever watched a color grading tutorial or downloaded a photo editing pack, you have probably seen the word LUT.
LUTs are used by photographers, video editors, and content creators to apply a specific color style quickly. But if you are new to color grading, LUTs can sound more technical than they really are.
The simple version: a LUT is a file that changes colors from one look to another.
Today, AI makes this even easier. Instead of manually building a LUT in professional software, you can use an AI LUT generator like Colorby to generate a LUT from a reference photo you already like.
What Is a LUT?
LUT stands for Look-Up Table. In plain English, it is a color translation table.
It tells your editing software: "When you see this original color, change it into this new color."
Think of it like a color translator — input is the original colors in your photo, output is the new colors defined by the LUT. A warm reference photo becomes a warm LUT. A cinematic film still becomes a cinematic LUT.
LUTs do not change the subject, composition, or details of your photo. They change how colors are interpreted. Most LUT files are saved in .cube format, compatible with Lightroom, Premiere Pro, Final Cut Pro, DaVinci Resolve, Photoshop, and other creative tools.
Why Photographers Use LUTs
Fast color application — Instead of manually adjusting warmth, contrast, saturation, shadows, and highlights every time, apply a LUT and instantly move the image toward a specific look.
Cross-tool workflow — Create a color style in Colorby, export it as a LUT, and use it in Lightroom, Premiere Pro, or another editing tool. Useful if you work across different apps or devices.
Batch consistency — Apply the same LUT across a travel album, Instagram series, product photos, or brand campaign to give the whole set a shared visual direction.
Sharing your style — A LUT can be shared with a team, sent to a client, or distributed to followers. It turns a color style into a portable, usable file.
Traditional Way to Create a LUT vs AI Way
The traditional way requires professional software like DaVinci Resolve or Photoshop. You manually adjust exposure, contrast, saturation, curves, color balance, shadows, and highlights — then export the result as a .cube file. This gives advanced users full control, but it requires color grading knowledge and significant time to test across different lighting conditions and skin tones.
The AI way starts from a reference photo instead. You choose an image with a style you like, let AI analyze it, apply the style to your photo, and export the result as a LUT. No technical knowledge required — you only need to know what kind of image you like.
That is why an AI LUT generator is useful for photographers and creators who want professional-looking color styles without learning a full color grading workflow first.
How to Generate a LUT from a Reference Photo Using Colorby
Step 1: Find a reference photo you like
Start with a photo that has the color style you want — a portrait, travel photo, film still, fashion image, or one of your own past edits. Choose a reference with a clear color direction. If you want a warm travel look, choose a warm travel reference. If you want a cinematic grade, choose a reference with controlled contrast and mood. Avoid references that are too low-quality, overexposed, or heavily compressed — the better the reference, the better the LUT direction.
Step 2: Upload the reference to Colorby
Open Colorby and upload your reference photo. Colorby uses AI to analyze the image's color palette, warmth, contrast, saturation, shadow tone, and overall mood. You do not start by changing technical settings — you start from visual inspiration.
Step 3: Apply the style to your photo
Upload your own photo and apply the reference style. A LUT should not only look good on the reference image — it should also work on your own photos. After applying, review the result: does the mood match what you wanted? Are colors too strong or too weak? Do skin tones still look natural? Adjust if needed before saving.
Step 4: Save the result as a Look
When you are happy with the style, save it as a Look in Colorby — Warm Travel, Soft Portrait, Clean Product, Blue Cinema, Film Mood. A Look lets you reuse the same color style later without exporting a file every time, and keeps your styles organized in your Look Library.
Step 5: Export the Look as a LUT file
When you want to use that style outside Colorby, export the Look as a .cube LUT file. Import it into Lightroom, Premiere Pro, Final Cut Pro, or another compatible tool and apply the same color style to other photos or videos.
LUT vs Look: What's the Difference?
A LUT is a file format — a .cube file you export, import, share, and use across different editing tools. Useful when you want to move a color style from one app to another.
A Look is a saved style inside Colorby — reusable, nameable, and organized in your Look Library for everyday use inside the app.
The relationship is simple: a Look is the style you manage in Colorby, a LUT is the file you export when you need it elsewhere.
Recommended workflow: use Colorby to match a reference photo → save the result as a Look → reuse the Look inside Colorby → export as a LUT only when you need it in another tool.
FAQ
What is a LUT file in photography?
A color transformation file that tells editing software how to change original colors into new colors — used for fast color grading and consistent visual style across photos and videos.
How do I create a LUT from a reference photo?
Upload the reference image to Colorby, let AI analyze the color style, apply it to your own photo, save as a Look, then export as a .cube LUT file.
What format are LUT files?
Usually .cube format, compatible with most professional photo and video editing software.
Can I use a LUT generated by Colorby in Lightroom?
Yes. Export the .cube file from Colorby and import it into Lightroom or any other compatible editing tool.
Is there a free AI LUT generator?
Colorby is free to download on iPhone. You can use it to generate LUTs from reference photos and test AI-powered color style creation.
Turn Any Reference Photo into a Reusable Color Style
A LUT may sound technical, but the idea is simple — a color translation file that helps you apply the same style across different photos, videos, and editing tools.
With Colorby, start from a reference photo, create a color style with AI, save it as a Look, and export it as a LUT when you need to use it elsewhere.
Generate your own LUT from any reference photo with Colorby → Download on the App Store.
