Dear Samsung Accessibility Team,

I am writing to file a formal accessibility complaint regarding the color correction functionality on the Samsung Galaxy Z Fold7.

I have protanomaly (red color vision deficiency), and I previously relied on Samsung Galaxy devices, including the Galaxy Z Fold4, to improve my ability to distinguish red from other colors.

Unfortunately, the Protan color correction mode on my Galaxy Z Fold7 produces an excessively green-looking color transformation that significantly reduces its usefulness for my vision.

This is not a request for ordinary display color temperature, saturation, or cosmetic customization. It is an accessibility issue affecting my ability to distinguish important visual information.

My preferred correction shifts red hues toward magenta or pink while preserving the appearance of other colors as much as possible. The current Protan correction does not provide a satisfactory result.

Technical evidence

I investigated the issue using Android Debug Bridge (ADB) and confirmed that enabling Protan color correction changes the SurfaceFlinger color transformation matrix.

With color correction disabled, the matrix is the identity matrix:

[1.000, 0.000, 0.000]
[0.000, 1.000, 0.000]
[0.000, 0.000, 1.000]

With Protan color correction enabled, the matrix changes to:

[0.461, 0.539, 0.000]
[0.378, 0.622, 0.000]
[0.310, -0.310, 1.000]

These observations demonstrate that the system applies a specific RGB transformation when Protan correction is enabled.

I also attempted to investigate whether the transformation could be customized through the standard ADB interface. A SurfaceFlinger service call returned "Operation not permitted," indicating that this particular interface is not accessible to my ADB shell session.

Requested corrective action

I respectfully request that Samsung:

Investigate whether changes to the color correction implementation have reduced usability for users with protanomaly compared with previous Galaxy generations.
Provide an option to shift red hues toward magenta or pink without excessive green distortion.
Restore or introduce personalized color vision calibration, including adjustable correction strength and hue mapping.
Consider supporting a user-adjustable color transformation matrix or equivalent accessible display customization feature without requiring root access.
Escalate this report to the One UI Accessibility and Display Engineering teams.

I am not requesting a generic color overlay, color lens, or display white balance adjustment. I need a correction that modifies color relationships to improve red-color visibility.

Please provide a case or reference number and confirm whether this issue can be reviewed by the engineering team.

I would also appreciate information about whether Samsung plans to improve or expand color vision correction options in a future One UI release.

Thank you for your attention to this accessibility concern.

Sincerely,

Samsung Galaxy Z Fold7 User

Original topic:

ACPI BIOS ERROR ON LAPTOP

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