Support — TetoColor
App Information
- Name: TetoColor
- Developer: teto LLC (teto.tokyo)
- Platforms: iOS 17.0+ / iPadOS 17.0+
- Supported languages (in-app UI): Japanese, English, Chinese (Simplified), Korean, Hindi, Bengali, Urdu, Arabic, Spanish, Portuguese, French, German, Russian, Turkish, Indonesian — 15 languages total
- Pricing: Free (ad-supported)
Contact
For support requests, please use our contact form.
Frequently Asked Questions
How do I extract colors from an image?
On the home screen, tap Gallery or Camera to select an image. Colors are extracted automatically. You can switch the algorithm (K-means / Median Cut / Octree / Wu) and adjust the color count (2–20) using the segmented control and slider.
What's the difference between the four algorithms?
- K-means (default): Highest quality. Runs 3–5 attempts and picks the best result.
- Median Cut: Fast, balanced — good for everyday use.
- Octree: Fastest. Suited for real-time processing.
- Wu's Method: Highest accuracy. Minimizes quantization error — ideal for print.
How do I get accurate CMYK values for printing?
Go to Settings → ICC Profile Management → tap the + button and import a .icc / .icm file. Direct links to Adobe and ECI official downloads are provided in-app. Once a profile is selected, the color detail card shows accurate ICC-based CMYK values.
When no ICC profile is selected, simple mathematical CMYK is shown (preview-grade only — not suitable for production printing).
What are color harmonies?
Five harmonies generated in the OkLCH color space from your selected base color: complementary, analogous, triadic, split-complementary, and tetradic. Access via the Harmony button on the palette screen.
Can I export to other apps?
TetoColor exports to four formats:
- Procreate (.swatches): HSB color space, up to 30 colors.
- Adobe ASE: RGB / CMYK switchable.
- Adobe ACO: Photoshop palette format.
- GIMP GPL: Plain text.
Choose a format on the export screen and use the share sheet or save to file.
How do I change the app language?
Go to Settings → General → Language and choose System default or one of the 15 supported languages. Changes apply immediately — no restart needed.
About advertising
TetoColor is supported by Google AdMob ads to remain free. Banner ads appear at the top of home / palette / harmony / export screens. Interstitial ads appear after every 3rd successful color extraction.
On iOS 14.5+, you'll see Apple's App Tracking Transparency prompt on first launch. Declining still gives you the full app — only non-personalized ads will be served.
Pricing
TetoColor is free. There are no in-app purchases or subscriptions. The app is funded entirely by ad revenue.
Disclaimer
TetoColor is provided "as is" without any warranties, express or implied. The developer is not responsible for any damages arising from the use of this app, including but not limited to palette accuracy, CMYK conversion fidelity, file export compatibility, or color reproduction in printed output.
For production printing, we recommend using the ICC profile specified by your print shop and confirming the final result with them.
The developer is not responsible for service interruptions caused by third-party providers (Apple, Google AdMob).
Related Pages
Last updated: May 6, 2026