In this article, you will learn
- what White Point Compensation is and what role it plays in profile calculation,
- how different values affect the highlights and the gray axis, and
- which settings are recommended for typical use cases.
1. Introduction
White Point Compensation for CMYK and RGB is a parameter used in profile calculation and separation calculation. It controls the extent to which the measured white point of the output media is taken into account when generating the color transformation. The reason for this is that the actual white of the substrate may differ from the reference white of the CMYK or RGB color space used. For example, an uncoated, yellowish, or otherwise tinted substrate has a different white point than a neutral reference color space.
It is important to distinguish between the physical paper white and how it is taken into account in the color transformation. A setting of 0% does not mean that the actual paper white is eliminated. The media naturally remains the actual output media. Instead, the parameter determines the extent to which its white point is taken into account when mapping colors, particularly in the highlights and neutral areas.
Figure 1: Comparison of the Reference White Point of the CMYK Working Color Space and the White Point of a Yellowish Substrate
2. Functioning
Two white points are particularly relevant for profile calculation:
- Reference White Point – the white point to which the source data or the selected working color space refers.
- Substrate White Point – the white point of the actual output media, determined from the measurement data of the characterization.
White Paper Compensation controls the degree of adjustment between these two reference points. The higher the setting, the more strongly the color mapping of highlights and neutral areas can be aligned with the white point of the output media. However, the exact mathematical implementation depends on the profiling software and its calculation algorithm. The percentage value should therefore not be understood as a simple linear blend of two Lab values.
Figure 2: Effect of White Paper Compensation on highlights and the gray axis(schematic)
2.1. Effect of the Values
The following descriptions should be understood as qualitative guidance. The specific change in a separation depends, among other factors, on the difference between the white points, the profiling method, the gamut of the media, and other separation parameters.
- 0 % – the influence of the substrate white point on the color mapping is minimized. The transformation therefore follows the reference color space more closely. This can be useful when the color impression of the source data should be changed as little as possible by the different substrate. The actual paper white, of course, remains unchanged.
- Medium Values – the substrate white point is taken into account partially. This can provide a balanced transition between the color impression of the source data and the visual appearance of the target media. A specific value such as 30% should be considered a project- or workflow-dependent setting rather than a generally applicable standard for every profiling project.
- 100 % – the influence of the substrate white point is maximized. This can result in highlights and neutral colors being more strongly adapted to the properties of the target media. However, this does not mean that the entire gray axis across the full tonal range is simply shifted toward the paper tone.
Figure 3: Color deviation of the gray axis depending on tone value (schematic)
The effect is typically most pronounced in the white and highlight areas. As color density increases, the direct influence of the white point on the perceived color decreases. However, this does not allow a general statement such as "the gray axis is neutral from a 20% tone value onward," as this depends on the specific profiling algorithm and the measures substrate.
Similarly, a schematic curve of the gray axis should not be interpreted as a colorimetrically calculated result. Reliable conclusions require the actual measurement data and the specific profile calculation used by the workflow.
Example
Assume a separation from a reference color space is transferred to a substrate with a significantly different white point. With low white paper compensation, the color impression of the source data is retained to a greater extend. With a high setting, the different substrate white point is taken into account more strongly in the color mapping. The extent to which neutral colors and highlights in particular are affected depends on the specific difference between the white points and the profile calculation.
3. Use in a Profiling Project
You can find the Paper White Compensation for CMYK [1] and White Paper Compensation for RGB [2] parametersin a profiling project under the Separation Parameters tab of the Create Characterization Profile step.
Figure 4: The options available under the Separation Parameters tab of the Create Characterization Profile step
Within the described workflow, the values range from 0% to 100%. A higher value increases the influence of the measured substrate white point on the calculated color transformation. The graphical display below the input field shows the two endpoints – white point of the reference color space and white point of the substrate in relation to each other. It is intended to illustrate the value range and does not itself represent the color transformation calculation.
The following recommendations apply to the use of this parameter:
- Low Setting – suitable when the color appearance of the source data should be affected as little as possible by the different substrate white point.
- Medium Setting – suitable as a starting point when a balanced relationship between source color appearance and consideration of the target media is desired. The specific value should be determined based on the test profiles and visual and/or measurement-based evaluation.
- High Setting – suitable when the substrate white point should be taken into account as strongly as possible during color adaptation, for example when the visual relationship between neutral areas and the substrate is a primary consideration. Use this setting for predominantly gray or neutral subjects, such as technical illustrations or catalog images containing large neutral areas, to prevent unwanted chromatic components from becoming visible in gray areas.
Effect Depending on the Difference Between the White Points
The effect of white paper compensation depends largely on the difference between the reference white point and the substrate white point. If the two white points are similar, the visible effect of the setting will correspondingly be minor. In contrast, when the substrate is significantly tinted or its white point deviates substantially from the reference white point, the change may be clearly visible, particularly in whites and highlights.
Use White Paper Compensation for RGB?
The White Paper Compensation for RGB setting is particularly relevant in the described workflow when RGB objects are converted directly to the output media using the RGB to Substrate option.
If, on the other hand, the CMYK working color space is used as an intermediate color space during color space conversion, RGB objects are first converted to this CMYK working color space, White Paper Compensation for CMYK is applied to the subsequent processing.
Article update: $PRODUCT_NAME_WORKFLOW 2.3.0 – 09/2026