Water gets different colors and other blocks in dark

Thank you for your report!
However, this issue has been temporarily closed as Awaiting Response.

We do not have enough information to find the cause of this issue.
Please force a crash by pressing F3 + C for 10 seconds while in-game and attach the crash report ([minecraft/crash-reports/crash-<DATE>-client.txt|https://minecrafthopper.net/help/guides/finding-minecraft-data-folder]) here.

Once attached, the report will be reopened automatically.

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but friend I was not crashed I was just changing the graphics from detailed to fast and that happened to me!

That's why I asked you to produce / force a crash report because it contains information about your PC that are important in order to be able to further investigate this issue.