PRINCIPLE 4: Perceptible Information - Be Independent

The design should communicate necessary information effectively to the user,regardless of ambient conditions or the user's sensory abilities.
The required information to use design should be clear and easily perceptible by all users.

• Adequate contrast should be provided between essential information and its surroundings.
• Legibility of essential information should be maximized.
• Elements should be differentiated in ways that can be described.
• To give instructions and directions should be made easier.
• Compatibility with a variety of techniques or devices used by people with sensory limitations should be achieved.