[Bug]: The icons for 2FA providers remain white regardless of whether the theme is dark or light

⚠️ This issue respects the following points: ⚠️

• This is a bug, not a question or a configuration/webserver/proxy issue.
• This issue is not already reported on Github OR Nextcloud Community Forum (I've searched it).
• Nextcloud Server is up to date. See Maintenance and Release Schedule for supported versions.
• I agree to follow Nextcloud's Code of Conduct.

Bug description

Nextcloud 31

Dark theme	Light theme

Nextcloud 32

Dark theme	Light theme

Steps to reproduce

1. Enable 2FA provider(s)
2. Go to login screen and seize username and password
3. Once arrived to the 2FA screen, test it with dark and light theme
4. See that 2FA providers' icons are always light, event when theme is light (hard to see) = lack of contrast, especially for visually impaired persons

Expected behavior

When theme is light, 2FA providers' icons must be dark

Nextcloud Server version

31

Operating system

Debian/Ubuntu

PHP engine version

PHP 8.3

Web server

Nginx

Database engine version

MySQL

Is this bug present after an update or on a fresh install?

Updated from a MINOR version (ex. 32.0.1 to 32.0.2)

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

What user-backends are you using?

• Default user-backend (database)
• LDAP/ Active Directory
• SSO - SAML
• Other

Configuration report

{
    "upgrade.disable-web": true,
    "simpleSignUpLink.shown": false,
    "skeletondirectory": "\/var\/www\/html\/themes\/hetzner\/skeleton",
    "templatedirectory": "\/var\/www\/html\/core\/skeleton\/Templates\/",
    "davstorage.request_timeout": 10800,
    "activity_expire_days": "31",
    "enabledPreviewProviders": [
        "OC\\Preview\\PNG",
        "OC\\Preview\\JPEG",
        "OC\\Preview\\GIF",
        "OC\\Preview\\BMP",
        "OC\\Preview\\XBitmap",
        "OC\\Preview\\MP3",
        "OC\\Preview\\TXT",
        "OC\\Preview\\MarkDown",
        "OC\\Preview\\OpenDocument",
        "OC\\Preview\\Krita",
        "OC\\Preview\\HEIC",
        "OC\\Preview\\Image"
    ],
    "forbidden_filenames": [],
    "remember_login_cookie_lifetime": 0,
    "memcache.local": "\\OC\\Memcache\\APCu",
    "appstoreurl": "https:\/\/apps.",
    "allow_local_remote_servers": true,
    "apps_paths": [
        {
            "path": "\/var\/www\/html\/apps",
            "url": "\/apps",
            "writable": false
        },
        {
            "path": "\/var\/www\/html\/custom_apps",
            "url": "\/custom_apps",
            "writable": true
        }
    ],
    "files_external_allow_create_new_local": false,
    "loglevel": 2,
    "log_type": "syslog",
    "updatechecker": false,
    "updater.server.url": "***REMOVED SENSITIVE VALUE***",
    "passwordsalt": "***REMOVED SENSITIVE VALUE***",
    "secret": "***REMOVED SENSITIVE VALUE***",
    "datadirectory": "***REMOVED SENSITIVE VALUE***",
    "dbtype": "mysql",
    "version": "31.0.10.2",
    "overwrite.cli.url": "https:\/\/",
    "dbname": "***REMOVED SENSITIVE VALUE***",
    "dbhost": "***REMOVED SENSITIVE VALUE***",
    "dbport": "",
    "dbtableprefix": "oc_",
    "mysql.utf8mb4": true,
    "dbuser": "***REMOVED SENSITIVE VALUE***",
    "dbpassword": "***REMOVED SENSITIVE VALUE***",
    "installed": true,
    "instanceid": "***REMOVED SENSITIVE VALUE***",
    "default_language": "fr",
    "default_locale": "fr",
    "default_phone_region": "FR",
    "mail_smtpmode": "smtp",
    "mail_smtpauthtype": "LOGIN",
    "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
    "mail_from_address": "***REMOVED SENSITIVE VALUE***",
    "mail_domain": "***REMOVED SENSITIVE VALUE***",
    "syslog_tag": "",
    "maintenance_window_start": 19,
    "redis": {
        "host": "***REMOVED SENSITIVE VALUE***",
        "port": "6379",
        "timeout": "1.5",
        "dbindex": "0"
    },
    "filelocking.enabled": true,
    "memcache.locking": "\\OC\\Memcache\\Redis",
    "memcache.distributed": "\\OC\\Memcache\\Redis",
    "maintenance": false,
    "defaultapp": "",
    "mail_sendmailmode": "smtp",
    "mail_smtpport": "465",
    "mail_smtpauth": true,
    "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
    "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
    "app_install_overwrite": [],
    "memories.exiftool": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/exiftool-amd64-glibc",
    "memories.vod.path": "\/var\/www\/html\/custom_apps\/memories\/bin-ext\/go-vod-amd64",
    "twofactor_enforced": "false",
    "twofactor_enforced_groups": [],
    "twofactor_enforced_excluded_groups": [
        "Machines Gr\u00e9sy"
    ],
    "trusted_domains": [
        ""
    ]
}

List of activated Apps

Enabled:
 - activity: 4.0.0
 - announcementbanner: 1.0.2
 - app_api: 5.0.2
 - bruteforcesettings: 4.0.0
 - calendar: 5.5.9
 - call_summary_bot: 3.1.0
 - camerarawpreviews: 0.8.8
 - circles: 31.0.0
 - collectives: 3.3.0
 - comments: 1.21.0
 - contacts: 7.3.8
 - contactsinteraction: 1.12.1
 - deck: 1.15.5
 - external: 6.0.2
 - federation: 1.21.0
 - files_accesscontrol: 2.0.3
 - files_automatedtagging: 2.0.1
 - files_downloadlimit: 4.0.0
 - files_lock: 31.0.3
 - files_pdfviewer: 4.0.0
 - files_reminders: 1.4.0
 - files_sharing: 1.23.1
 - files_trashbin: 1.21.0
 - files_versions: 1.24.0
 - firstrunwizard: 4.0.0
 - groupfolders: 19.1.10
 - htmlviewer: 31.0.0
 - impersonate: 2.0.0
 - mail: 5.6.2
 - metadata: 0.23.0
 - nextcloud_announcements: 3.0.0
 - notes: 4.12.4
 - notifications: 4.0.0
 - notify_push: 1.2.1
 - ownershiptransfer: 1.3.0
 - password_policy: 3.0.0
 - passwords: 2025.11.10
 - photos: 4.0.0
 - polls: 8.5.0
 - previewgenerator: 5.11.0
 - privacy: 3.0.0
 - quota_warning: 1.22.0
 - recommendations: 4.0.0
 - richdocuments: 8.7.7
 - secrets: 2.1.4
 - serverinfo: 3.0.0
 - sharebymail: 1.21.0
 - sharereview: 2.0.0
 - spreed: 21.1.5
 - support: 3.0.0
 - systemtags: 1.21.1
 - tables: 1.0.1
 - text: 5.0.2
 - theming_customcss: 1.19.0
 - twofactor_admin: 4.9.0
 - twofactor_email: 2.8.3
 - twofactor_nextcloud_notification: 5.0.0
 - twofactor_totp: 13.0.0-dev.0
 - updatenotification: 1.21.0
 - user_status: 1.11.0
 - weather_status: 1.11.0
 - webhook_listeners: 1.2.0
 - workflow_media_converter: 1.15.1
 - workflow_pdf_converter: 2.0.0
Disabled:
 - admin_audit
 - dashboard: 7.11.0
 - encryption
 - files_external
 - logreader: 4.0.0
 - related_resources: 2.0.0
 - survey_client: 3.0.0
 - suspicious_login
 - user_ldap

Nextcloud Signing status

No errors have been found.

Nextcloud Logs

Can be provided is necessary

Additional info

No response

Start at the 2FA screen described in the reproduction steps and trace how the provider icons are rendered under the dark and light themes. Done means the icons have sufficient contrast and appear dark in the light theme while remaining appropriate for the dark theme; verify both theme variants with enabled 2FA providers.