COLOR MARKER · ANDROID · v1.0

Capture.
Measure.
Compare.

Extract colors from fabric photos as HEX. Measure point-by-point with a grid and eyedropper. Correct lighting bias with white-leveling. Zero permissions. No internet. Stays on-device.

#FF5A5A
Capture
#FFD24C
Measure
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Compare
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Save

Four things, on purpose.

No login. No cloud. No AI. No search. No share. Just color, recorded.

01 · CAPTURE

Pick a photo

Uses the system photo picker. No storage or camera permission required.

02 · EXTRACT

5 representative colors

AndroidX Palette auto-extracts the most-used colors and shows them as HEX.

03 · MEASURE

Grid & eyedropper

3/5/7 grid for average color by region. Tap to sample a precise point.

04 · BALANCE

White-leveling

Pick a white reference and the lighting bias is corrected — raw and corrected both kept.

05 · MEMO

Notes & save

Attach fabric name, vendor, material. Find them again from the list.

06 · COPY

HEX copy

Tap a color chip to copy to clipboard. Straight into your design tool.

Measuredperceived.

The pixel value a sensor records and the color your eye reads are not the same. Gloss, texture, warmth, and light all sit in between. Color Marker is the tool for collecting that gap as data.

MEASURED COLOR

The raw value the sensor read. Grid averages, eyedropper points, white-leveling corrections — raw and corrected kept side by side. Reproducible numbers.

PERCEIVED COLOR

What the eye actually sees, shaped by gloss, texture, warmth, and lighting. v1 captures it in notes; v2 will add gloss / texture / warmth fields for a perceptual mapping.

— GAP —

Recording and comparing that gap is the actual subject of this app.

Three steps.

From a single photo to saved colors in about 30 seconds.

STEP 01

Pick a photo

Add photo on the home screen → choose a fabric image from your gallery.

STEP 02

Measure color

Review the 5 auto-extracted colors and grid readings. Use the eyedropper for precision.

STEP 03

Note & save

Add a memo and save. Tap a HEX chip in the list to copy.

Measurement log.

What the 33 bundled samples look like after first-run auto-seeding (example).

colormarker — first-run seeding · 33 samples
[1/4] LOAD samples bundled in assets/samples ✓ 33 files · 56KB
[2/4] DECODE webp · jpg · EXIF rotate ✓ 33 ok
[3/4] EXTRACT palette · 5 colors per image
[4/4] SAMPLE 7×7 grid · 49 points each

SEEDING COMPLETE · 33 entries · materialType="sample"

— sample palette · P2_001_mtx_silk_twill_tartan_heavy —

NOTE 0 permissions · no internet · data stays in filesDir/captures only

Specs.

Small footprint, minimum permissions.

PLATFORM

Android 8.0+

minSdk 26 / targetSdk 34. Jetpack Compose · Material 3.

PERMISSIONS

Zero

System photo picker only. No camera, no storage, no internet permission requested.

STORAGE

Local only

JSON-backed EntryStore. No remote server, no cloud, no analytics.