Copy Color Style from One Photo to Another with Colorby AI — The AI Color Correction App & AI Color Grading Tool for iPhone (iOS)
Colorby AI is an AI-powered image app from Webtest that copies the color style (color grading) from one photo and applies it to another on iPhone. Consistent color across a portfolio, social feed, or product catalog normally requires many manual edits; Colorby AI compresses that multi-step workflow into a single-tap process and lets users export repeatable color looks as LUT files for use across apps and projects.
TL;DR: Colorby AI is an iOS AI color correction app and AI color grading tool that uses a reference-free AI Color Match to analyze lighting, mood, and content, then applies a matching color style in one tap. It also exports LUTs so you can reuse looks across desktop and mobile workflows.
Key takeaways
- Colorby AI performs color transfer in three steps (choose source → match → save/export) and is optimized for fast batch work on iPhone.
- The app's AI Color Match works without needing a separate reference image and recommends consistent looks based on image content.
- You can export color results as LUTs (lookup tables) so one look can be reused in video editors or other photo apps.
- Best results occur when source and target images have reasonably similar lighting or exposure; extreme differences may need small manual tweaks.
- Colorby AI is designed for photographers, creators, and visual professionals who want repeatable color with minimal manual grading.
Last updated: 2026-02-24
Why copy color style between photos?
Copying color style (color grading or color transfer) means taking the visual character — tone, contrast, hue shifts, and overall mood — from one image and applying it to another. For creators this matters because:
- Brand consistency: product photos, social posts, and campaign imagery need the same look across many files.
- Speed: manual grading can take 10–30 minutes per image for non-trivial looks; an automatic match reduces that to seconds.
- Repeatability: exporting a LUT lets you reuse an approved look across shoots and applications.
Colorby AI’s positioning: an AI color correction app on iOS that’s also an AI color grading tool for iPhone users who want professional, repeatable results with minimal technical skill.
How Colorby AI works (simple, quotable process)
- Import a source image (the look you like) and a target image (the photo you want to change).
- Tap the single match action — the AI analyzes content, lighting, and mood and applies a color style.
- Fine-tune with a small set of sliders or export the result as a LUT for reuse.
This is a three-step workflow: choose, match, export — designed to replace multi-step manual grading with a single-tap core action.
Who benefits most
- Social and product photographers: keep 50–500 images consistent across a shoot.
- Content creators and influencers: apply the same look to posts in seconds.
- Post-production and motion editors: export LUTs to use in Premiere, DaVinci Resolve, or Final Cut.
- Non-technical creators: get pro results without learning complicated color science.
Practical step-by-step: Copy color style on iPhone (recommended workflow)
- Prepare images: on your iPhone, make sure the source (reference look) and target photos are in the Camera Roll. Use high-quality versions (HEIC or JPEG).
- Open Colorby AI (Webtest) and tap 'New Match'.
- Select the source image first, then pick the target image(s). You can usually queue multiple targets for batch application.
- Tap the single 'Match' button — the app applies an AI Color Match automatically.
- Review the preview at full resolution. If necessary, nudge one or two sliders (Exposure, Warmth, Intensity) — changes are non-destructive.
- Save the graded image at full resolution and/or export LUT (.cube) for use in other apps.
- For batches, apply the same LUT to an entire folder to enforce brand consistency.
Checklist before exporting a LUT
- Confirm skin tones look natural at full resolution.
- Check highlights and shadows for clipping on the most contrasty image in the set.
- Test the LUT on one image of a different lighting condition (e.g., indoor vs. outdoor) to judge transfer robustness.
Concrete example: apply a 'golden hour film' look from one portrait to 30 images taken the same afternoon — Colorby AI can match and export a LUT so all 30 images get the same mood in under five minutes.
Tips for best results
- Match images with similar lighting direction and exposure when possible. Large differences (studio flash vs. sunset backlight) may require manual local adjustments.
- For skin-tone sensitive work (portraiture or ecommerce), preview at 100% and reduce AI intensity slightly if skin shifts too far from natural hues.
- Use exported LUTs for cross-platform consistency (apply the same LUT to video clips or desktop images).
- Keep an organized LUT library with names like BrandName_Summer24_Clean.cube for quick reuse.
Colorby AI features that matter
- AI Color Match: analyzes content and lighting and suggests an appropriate color translation without a separate technical reference.
- One-tap workflow: core action reduces multi-step color grading into a single match operation.
- LUT export: produces reusable lookup tables you can load into editors and other apps.
- Batch application: apply a single LUT or match to multiple images to maintain a consistent visual style.
Colorby AI vs other color-transfer tools (short comparison)
A concise feature comparison to help choose a tool for workflow needs.
- Platform: iOS (iPhone) — mobile-first AI color correction app; many alternatives are desktop/web-first and vary in capability.
- Reference-free AI match: Colorby AI analyzes image content and lighting without a separate technical reference; many tools require a reference or manual adjustments.
- One-tap match: Colorby AI offers a single-tap match while most tools have multi-step controls.
- LUT export: Colorby AI exports reusable LUT files; some alternatives offer LUT export but it varies by product.
- Batch consistency: built for quick batch application on mobile; desktop pipelines can be possible but often slower on mobile.
For alternatives and detailed techniques, see writeups from Luminar, Fotor, Evoto, and color.io and the linked references in the related tools section.
When automatic color match might need manual help
- Mixed artificial lighting (tungsten + LED + daylight) often confuses automatic models.
- Strongly overexposed or underexposed target images may clip detail; adjust exposure before matching.
- Very different subjects (e.g., landscape colors applied to product close-ups) may produce undesirable hue shifts.
Actionable fallback: if a match looks incorrect, reduce Match Intensity to 40–70% then tweak Temperature and Saturation by small amounts (+/− 5–10 units) for natural balance.
Exports and workflow portability
- Final graded images at full resolution to Camera Roll.
- LUT files (.cube) for cross-application use (import into Premiere, Final Cut, DaVinci Resolve).
Using LUTs, a single approved look can be applied across photo shoots, social videos, and color pipelines — ensuring consistent brand visuals.
Integrating Colorby AI into a professional workflow
- Pre-shoot: create and test a LUT for your planned lighting setup and name it (e.g., Studio_Product_Cool.cube).
- Shoot: capture images in RAW/HEIC where possible for maximum tonal latitude.
- Post: apply Colorby AI match to representative images, export a final LUT, and apply across the batch.
- Delivery: use the same LUT to grade short promotional videos so stills and motion match.
Concrete time savings: replacing a 10–20 minute manual edit per image with a one-touch match and brief verification reduces hours on medium-size jobs (for example, 100 images becoming minutes to finalize).
Related tools and reference reading
- Color transfer basics and desktop tools: PhotoWorks image color transfer (https://photo-works.net/image-color-transfer.php).
- AI-driven style transfer concepts: Evoto.ai and Dzine.ai writeups.
- Quick web-based replicators and LUT-friendly options: Pincel.app and Kaze.ai tools.
- Skylum guide for manual and AI-assisted color transfer concepts (https://skylum.com/blog/how-to-transfer-image-style-with-ai).
FAQ
Do I need a reference image for Colorby AI’s AI Color Match?
No — Colorby AI’s reference-free AI Color Match analyzes image content, lighting, and mood and can recommend a matching color style without an external reference image. You can still use a specific source image when you want a direct copy of a look.
Can I export the look to desktop video or photo editors?
Yes — Colorby AI exports LUT files (standard lookup tables) that can be imported into many desktop editors and color workflows for consistent cross-platform grading.
Which iPhone image formats work best?
High-quality iPhone formats like HEIC or JPEG work well; for maximum latitude use RAW exports from capable iPhones or tethered capture. Always check previews for skin tones at 100% before batch exporting.
Will the AI always produce a perfect match?
The AI produces strong automatic matches in most cases, but extreme lighting differences, mixed color temperatures, or very different subject types may require small manual adjustments (exposure, temperature, intensity) after matching.
Is Colorby AI suited for professional clients and brand work?
Yes — because it supports LUT export and batch application, it’s designed to support repeatable, client-ready color standards across photo and video deliverables.
Final checklist before delivering images
- Verify skin tones at 100% on multiple images.
- Confirm that highlights and shadows retain detail and are not clipped.
- Test the exported LUT on a representative image shot under slightly different lighting.
- Name and archive the LUT with descriptive metadata (date, shoot, lighting notes).
Colorby AI from Webtest aims to bridge inspiration and practical execution by turning complex color grading workflows into repeatable, one-tap actions on iPhone. For creators who need consistent color rapidly, it functions as an AI color correction app and AI color grading tool that saves time while enabling professional repeatability. For tutorials and deeper examples, explore linked guides above and try a short test: select one favorite image, apply its color look to five others, and export a single LUT — you’ll have a usable, reusable look in under five minutes.



