Detection approach
CSS ActiveText rendering anomaly detected. The browser fails to render standard OS system colors (like ActiveText) correctly, defaulting to solid red or anomalous RGB values. This is a known CSS leak in Headless Chromium environments.
How this helps detect bots
Collect this signal alongside session context, request metadata, and other independent indicators. A single anomaly is a lead, not a verdict; corroborating anomalies make automated traffic more likely.
Legitimate traffic to consider
Users with high-contrast custom accessibility themes or system color overrides (e.g., night mode).
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