Setting a custom white balance without a gray card is simple and effective though choosing an area in the image requires some care. Otherwise, some unexpected results will occur.
Select the white balance picker (eyedropper) (W) and click-on the brightest white area in the image that has some detail. Do not select specular highlights or other areas that are clipped as the results could be unpredictable and undesirable. If there is no white surface in the image, look for a bright gray area.
Repeated selections using the White Balance picker overrides the previous setting and, like other tools in Capture One, has no detrimental effect on your source image file.
- Select an image and go to the Color tool tab.
- In the White Balance tool, select the White Balance picker (eyedropper icon) and click-on a bright white or light neutral area in the image with detail (do not select specular highlights or other areas that are clipped). Note that the White Balance picker is also available in the cursor toolbar.
- Repeat the selection until you are satisfied with the result. The previous Temp and Tint values will be overwritten and updated. The Mode field will display the word Custom to show that you have overridden the camera's settings.