100% Offline · No account · No cloud

Tap a pixel.
Get the exact color.

Point your phone at anything. In one tap you get HEX, RGB, CMYK, HSL, RAL Classic and NCS — ready to spec, quote or order.

⬇ Download APK View on GitHub How it works ↓

Android 8.0+  ·  ~6 MB  ·  Requires Install unknown apps enabled

Home screen
Home
Quick Analysis
Quick Analysis
Project mode
Projects
ℹ️

How to install the APK

ColorGPT Studio is not on the Play Store yet — it installs via sideload.
On your Android device: Settings → Apps → Special app access → Install unknown apps → enable for your browser or file manager. Then open the downloaded APK and tap Install.

Requires Android 8.0+ (API 26). No internet permission — nothing leaves your device.  More info →

What it does

Everything a pro needs.
Nothing you don't.

🎯

Tap-to-Pick

One tap on any pixel — instant extraction. No sliders, no manual input, no guessing.

🎨

Full Color Vocabulary

HEX · RGB · CMYK · HSL · RAL Classic · NCS. Every format you need for every workflow.

📁

Projects

Group images under a job. The global palette builds itself automatically as you pick.

⚡

Quick Analysis

Instant on-site session — no project needed. Shoot, pick, share. Done in under 10 seconds.

🏷️

Annotate

Label, note, material code, craft tags — every color point carries context to the client.

🔒

Zero Internet

No network permission. No analytics. No backend. Your job data stays on your device.

Tutorial

From zero to palette
in four taps.

01

Open a project — or go Quick

Tap + on the home screen to create a named project (useful for jobs you revisit), or tap Quick Analysis for an instant on-site session with no overhead.

Home screen
02

Load or shoot an image

Hit the camera icon to take a photo right now, or the gallery icon to pick an existing one. The image loads instantly — no upload, no processing spinner.

Project screen · Quick Analysis
03

Tap any pixel to extract its color

Touch directly on the area you want. A dot appears on the image marking the exact point. You instantly see HEX · RGB · CMYK · HSL · RAL Classic · NCS — all computed on-device, offline, in milliseconds.

Need to zoom in first? Pinch to zoom, drag to pan, then tap. The dot follows your finger precisely.

Interactive canvas
04

Annotate the point

Tap any color dot to open its editor. Add a label ("ceiling"), a note ("match existing trim"), a material code, and craft tags like paint · fabric · wood. Everything is saved locally to the project.

Color point editor
05

Extract the full palette — then Ask AI

Tap ✦ Extract palette to run K-Means clustering on the entire image and surface the dominant colors automatically. Then tap Ask AI to generate a ready-to-paste prompt describing every color point with codes and context — copy it straight into ChatGPT, Claude or any LLM.

Palette · Ask AI
06

Share or export

Use the Share button to send the generated prompt to any app — email, WhatsApp, Notion, your CRM. No export format to configure, no account to log into. Done.

Share sheet
Built with

Modern Android.
No shortcuts.

Kotlin
Language
Jetpack Compose
UI + Material 3
Room + KSP
Local DB
Koin
Dependency Injection
Coil
Image loading
K-Means
Custom color engine

Clone it. Build it. Ship it.

Open source. MIT licensed. No setup wizard required.

⬇ Download APK View on GitHub 
git clone https://github.com/plana93/ColorGPTStudio.git
cd ColorGPTStudio
./gradlew installDebug