Which colors are not assigned numerical color units?

Which colors are not assigned numerical color units?

• A. pink and red
• B. blue and red
• C. greenish-blue and red
• D. blue and gray

Answer: (B)

In this color measurement context, not every color name corresponds to a specific numeric color unit on the standard scale. Some colors are used as reference points or are described in terms of mixtures or contrasts rather than assigned a single cu value. Blue and red in this question are the colors treated as not having a numerical color unit on the chart, so they’re the best choice for “colors not assigned numerical color units.” The other color pairings described can be matched to a Pt-Co standard with a defined numeric color value on the scale, which is why they don’t fit the question as well.

In this color measurement context, not every color name corresponds to a specific numeric color unit on the standard scale. Some colors are used as reference points or are described in terms of mixtures or contrasts rather than assigned a single cu value. Blue and red in this question are the colors treated as not having a numerical color unit on the chart, so they’re the best choice for “colors not assigned numerical color units.” The other color pairings described can be matched to a Pt-Co standard with a defined numeric color value on the scale, which is why they don’t fit the question as well.