What type of standard defines the meaning of various colors using light wavelength measurements?

The correct answer is a consensus standard because this type of standard is developed through the collective agreement of multiple stakeholders, often including experts in the field and organizations that share common interests. In the context of defining the meaning of various colors based on light wavelength measurements, a consensus standard would typically involve collaboration and input from scientists, industry professionals, and organizations dedicated to color measurement and specification.

Consensus standards are widely recognized and adopted for their authority and reliability, ensuring consistency in color definitions across various applications, such as colorimetry, design, and manufacturing. They provide a framework that helps ensure that when specific wavelengths of light are measured and identified, the corresponding color is consistently understood and communicated.

Legal, internal, and regulatory standards do not specifically address color definitions using light wavelengths in the same broad, collaborative manner as consensus standards. Legal standards are often mandates set by laws or regulations rather than agreements among experts. Internal standards are created within a single organization to guide its processes and might not be universally accepted. Regulatory standards are generally enforced by government entities and focus more on compliance and safety rather than defining technical characteristics like color based on wavelength.