On maps, the colours displayed by Prismarine blocks and Dark Prismarine blocks are switched. This is also the case for their slabs and stairs, and Prismarine Bricks have the expected colour.
What I expected to happen was...:
I thought that Dark Prismarine would appear darker than Prismarine.
What actually happened was...:
The inverse was true.
Steps to Reproduce:
1. Place Prismarine and Dark Prismarine in the world.
2. Make a map in the area with the Prismarine and Dark Prismarine you have placed down, so that both are visible
Thank you for your report!
However, this issue is a Duplicate of MC-140879.
It has been linked to this report. If you have additional information, please add it to that report.
Please search before reporting, as it's likely that one exists already.
Quick Links:
📓 Issue Guidelines – 💬 Community Support – 📧 Customer Support – 📖 Game Wiki