It's been a while since the last SPUM update news.
This update has enhanced color specification functionality. It has been updated to allow users to select from a wider variety of colors, moving beyond the previous focus on solid colors.
As shown below, you can select the desired color palette by choosing Type1 or Type2 at the top.

When Type2 is selected, you can choose the existing color.

Additionally, you can directly input custom Hex color codes to add desired specific colors, and a copy function has been added to allow for detailed color adjustments in external software like Photoshop using colors selected in the Unity Editor.
Additionally, 17 dedicated save slots have been added at the bottom to store and use frequently used colors. It is also possible to delete them using the “D” button.
Please refer to the GIF image below for the overall usage method.

This feature is applied from version 161. Since it is currently pending review on the Asset Store, you should be able to check it once the review is completed soon.
Thank you.