What challenges do you face when reading logos, symbols, or color-coded signs?

Hi everyone! 👋 We’re a student research group working on how color-blind users interpret logos, signages, and symbols. Since we don’t have access to color-blind participants locally, we wanted to ask this community for real insights.

If you're comfortable, could you share: Situations where logos or icons were hard to understand Problems with color-only signages (ex: red–green metro lines looking identical) Any symbols that you frequently misread or confuse What design changes actually help you (shapes, patterns, labels, contrast, etc.)